Review: Cthulhu Mod Hastur RDTA

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I eyed the Hastur RDTA for quite a while before deciding to take the chance on one.  The Hastur v1 RDA is one of my favorite flavor RDA’s so I figured it was a good gamble.  Cthulhu Mod is a small China based company that continually pushes out some interesting items.  The Hastur RDTA takes the removable build deck and direct coil airflow from the UD Bellus, the top fill similar to the Cirrus, and the Velocity style build deck from the Aromamizer in an attempt to make the perfect RDTA.

Aesthetics

The Hastur RDTA is a fairly standard looking RDTA.  It has a very nice stainless finish free from blemishes.  It has a

Gracing the chimney is the Hastur logo and a mysterious skeletal figure wearing a cloak.

Gracing the chimney is the Hastur logo and a mysterious skeletal figure wearing a cloak.

slight taper to the bottom where the 510 connection is making it fit closer to the standard 22mm width while the tank section is slightly wider.  Gracing the chimney is the Hastur logo and a mysterious skeletal figure wearing a cloak.  The logo is quite subtle and hard to make out unless you’re looking closely at it.  It is also a larger RDTA in height at 50mm.

A delrin wide bore drip tip is included as well as a 510 drip tip adapter.  I don’t enjoy the delrin tip as it’s wider than the chimney with a taper to 510 and it doesn’t have as good of flavor on my typical build.

Build Quality

The build quality of the Hastur RDTA is quite nice.  Cthulhu caught some flak in the past for metal shavings and rough edges on their Cthulhu v2 RTA.  When I received my Hastur it was free from any observable machine oil or metal shavings.  It seems that Cthulhu Mod took the previous complaints to heart because the Hastur looks very polished and cleaned up.

The juice flows underneath the build deck and is soaked up via 4 holes in the juice well.

The juice flows underneath the build deck and is soaked up via 4 holes in the juice well.

There are a slew of different o-rings of various sizes on the Hastur.  I had trouble with one that is on the base of the chimney.  I couldn’t see that it was there and, during my standard new atomizer scrub, promptly brushed it down the drain.  I have been told that these are 7mm x 1mm o-rings so you may want to keep that in mind as there was only 1 extra one.  It’s not so loose that it falls off, but depending on how thoroughly you clean your atomizers you may want to keep an eye on it.  I do not know if they’re available for purchase from Cthulhu Mod.  I have washed the tank out several times and have not lost another so it is secure.

Functionality

There are 3 main elements to the Hastur RDTA to break down.  The top fill, the build deck, and the direct airflow.

The top fill, simply isn’t great.  To top fill you close off the airflow and pull up the top cap to expose the fill hole that is supposed to accept liquid.  Filling the Hastur via this method is akin to trying to feed a toddler green beans.  It just doesn’t like to do it and more times than not ends up spitting back at you.  As such you must fill it at a sharp angle as well as slowly and delicately in a manner that will test your patience.  I’ve become progressively better at filling it after several tank fulls.  I was first timing it around 2 minutes to fill and probably have it down to just over a minute.

It has a very nice stainless finish free from blemishes

It has a very nice stainless finish free from blemishes

 To help with this Cthulhu Mod included a blunt tip needle bottle with the device.  

The top fill hole is also rather small.  It will accept the standard needle tip style plastic bottle with a little persuasion but if you have a glass dropper you’re out of luck.  I’ve found unicorn bottles, like Chubby Gorilla bottles, work the best if they have the small tapered tip.  You could also just unscrew the base and fill it the old fashioned way but that defeats the purpose of top fill and leaves the glass somewhat precariously held in.

Another top fill windfall is that the entire top part comes up. Due to it’s design it works like a plunger compressing air at the top of tank.  So even if you close off the airflow, closing the top fill will force just enough extra liquid into the chamber to be annoying and slightly flood it. It helps to not fill it all the way to the top.

The removable deck is quite handy.  It’s convenient to adjust or replace wicking when you’re burning through a large bottle of liquid.  The build deck as you’d expect is rather nice.  The posts on mine are solid and are machined well.  It’s a breeze to build anything on it and the post holes are 2mm to accommodate some modest clapton builds.  The screws seem solid and the allen wrench actually seems to be the perfect size.

The way your coils get juice is very similar to the Aromamizer.  The juice flows underneath the build deck and is soaked up via 4 holes in the juice well.  If you have to remove the deck there will be juice beneath the deck and will make a small mess.  I have found that fluffing the wick ends and curling them slightly under the coil while making sure they cover the holes seems to work the best.

The direct coil airflow creates an RDA-like experience in a tank.  On the Hastur, due to the sculpting inside the base the coils are quite a bit recessed behind the airflow holes.  All things considered the flavor on the tank is pretty good.  I would put it just slightly under the Bellus.  The airflow ring of the Hastur does trap condensated juice behind it making it slightly annoying to adjust in any manner without getting juice on your hands.

Summary

 To top fill you pull up the top cap to expose the fill hole.

To top fill you pull up the top cap to expose the fill hole.

The Hastur RDTA is a decent RDTA.  The top fill, definitely could be improved.  I find there is a learning curve with all devices and after spending a while with the Hastur it’s quirks, while frustrating at first, don’t bother me much anymore.  The Hastur holds 6.7ml of juice and when you get it wicking well, you typically don’t have to worry about refilling it often.  Once I figured out the wicking, it makes very nice clouds and has good flavor to go along with them.  Definitely enjoyable enough to keep in my daily rotation.

The Hastur RDTA can be purchased at http://www.cthulhumod.com

 

Specifications: Measurements:
Air holes align with coils 22mm at the base, 23mm at the middle
Top-side refill(Threading free) 50mm tall
Two juice well for easy wicking 15.5mm build deck
4 juice holes are under the juice well. 2mm wire holes
Velocity style posts 6.7ml capacity
Bigger chimney and drip tip(comes with 510 drip tip adapter)
All parts are removable,easy to clean
Build deck can be accessed without draining the tank.
Adjustable 510 pin

Author: Scott

Vaping since Jan 1, 2014. When I first started I was lost in the world of vaping. I didn't know where to begin. Once I found my way I wanted to help others on their path. So I started writing juice reviews on JuiceDB and eventually started reviewing new hardware I purchased. While I don't consider myself an expert, I am somewhat of a vetern of vaping, and I hope my casual-advanced vaper opinion provides you assistance. You can find me on Reddit as well under the user name sc0lm00.

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