I have been using this Raydiant Titanium Vapor Engine(RTVE) for about two weeks now.
With a little trial and error I have figured out how to get great hits.
You need a great lighter and a large can of butane. The lighter has been the most frustrating part. I am keeping my eye open for a small jewellers tourch.
I got a new grinder and started using a mortar and pesttal. The finner the better, but I'm sure this is best with any vaporizer
I load the barrel with just a pinch, about 10% of a regular splif.
Now you need good hands. I hold it like a regular pipe. I then spin the barrel with my ring finger on the mouth piece. I heat the barrel by skimming the flame over the barrel. Making sure too keep the flame away from the aluminium body. Heating and spinning the barrel quickly, about 15 seconds, I watch for a little vapor to drift out. Now remove heat and take a short soft drag. Heat and spin for 2 seconds, you should see vapor drift out again. Remove heat and take another drag. Repeat steps until you can't inhale anymore.
I can get 3 hits from that pinch and now the RTVE's body and my lighter are too hot to handle. I will not be using this in a group. I can't even see myself taking it out of the house. You can't put it in your pocket after you use it. Way to hot.
I have had it combust a few times. That taught me how much heat was the limit. Keep it clean so it is easy to spin.