I'm a proud UD owner
http://www.underdogvapes.com/vaporizers/vapes-all/ash-genie-lamp-13449/
I am happy to have found that the larger silicon tube fits perfectly into the open throat of what I believe is a generic 14mm size downstem for my "poor man's Cloud" alternative, and I am quite happy with the result. I have a 10" high narrow neck w/ ice catcher water device, with a nice downstem diffuser that isn't too big, but just the perfect match for the solo and the UD. I'll post some pics later as it does provide just the right amount of cooling off so I can take as big of a hit off either the UD or Solo, as long and big as my lungs can handle with pretty much complete comfort.
Now, I have also found a few little things that I was hoping to get some input on. Is there an ideal screen distance that you experimenters have found alter the density or flavor, and to me just as important, the issue of quantity/quality of draws per load? Do you get a certain amount of quality draws? I usually get 3-5 per .08-.1 UD silicon through water, but that's it. I get 3-5 times that many hits with the same amount in the Solo. I'm not trying to be over the top on how the Solo outperforms, these are just hard comparisons I'm noticing and I feel are valuable to share as I am quite into figuring this stuff out. I want the most overall efficient, best tasting, flexible with the most types of materials, with the most variable temp control, density control, combination with as FEW items as possible. I feel like I'm a test lab at times, way too many items trying to all compete to do the same thing. UD seems to be a permanent solution, the Solo so far seems great but I feel I might be missing something as much as my personal data seems to show it is an extremely efficient device. (still waiting for more side by side comparison feedback on Inhalator/Solo or any other device that perhaps has features Solo doesn't have.
Some other observations: I love the Solo, but I am also very much using it as a primary benchmark reference device as it does well in every area I feel is important. Flavor, density, efficiency. The Solo seems to stretch things as a comparison, primarily because I get 3-5 sessions per bowl of 5-10 draws per session. I begin at 2 with quite dry ground material through a sharpstone. I usually get 8-10 good draws at 2-3, then 2 more 8-10 draws at 3-4 and then sometimes I'll go higher but usually I stop there. Wanted to accumulate some ABV to see if it is worth playing around with for concentrates. So 20-40 draws per bowl by being able to vape at different temps versus 3-6 good draws on my UD. Now the first few draws on the UD are usually stronger than the first few on the Solo, but not always, and sometimes the Solo goes for 30-40 draws on one bowl. Bottom line, it takes way fewer draws to get to where you get no more vapor even though there is still green in the bowl load. I've been revaping the UD leftovers successfully when it appears to still have a lot of green in it and with the Solo I get at least a hit or 2, sometimes several really good ones. I usually start at 3, then get a few really nice draws at 4-5 on the Solo with the remains of the UD, so I'm not quite sure if this is just me that is having this kind of results, or is this something that other portables do similarly? Does it seem strange that I am able to get more out of the UD remains in the Solo?
I think I probably need a VVPS to give me some more flexibility on the UD and that may help get some more out of the herb without having to pack it so full or revape it with the Solo.
Also, I'm open to consider it could be a result of a flaw in my technique or some tweak or suggested amount or something else I might be doing wrong?
Also, it seems that when I pack the bowl more it does get much better hits but I get dark brown as well as very green, so it seems to need some stirring sometimes. Is that expected? If I fill say 1/4 of the space in the stem versus 1/2 full? It makes a big difference surprisingly. I have to stir which is not always successful in getting the dark ABV.
The other issue was trying to factor in the type of stem, glass vs. silicon, then respectively, the distance of the screen down the neck, and 3rdly, the amount and relative depth of the bowl to fill as the primary variables, assuming the herb is of high quality and as dry as possible to begin with?
Thanks!
J
.
try varying your load amounts, screen positioning, and draw technique. get to know your Dog a little more before pulling the trigger on a VVPS.
At half the price of the SYN I posted, with less volume and the same amount of diffusion, I would think that the Travel Tube would be a MUCH better choice. Silly me. 
