It is brazing, I know that, you know that, everyone else knows it as welding, thats why i said it. Its just a more common name. Anyway from what I've heard, copper pipes as well as other pipes are USUALLY brazed in order to seal joints. And infact using Barry's air pump (partner in business) we got it up to 150 psi before the hose connector blew off since we were using those cheesy plastic tubes since I didn't feel like cutting off a few inches of 1/4 inch braided fuel line for an experiment. (expensive stuff). And guess what, NO air leaks in the bottle. As far as I'm concerned I have already perfected or fixed all of the mentioned problems in all forums anywhere! So quit bugging me and buy them!
Funny story... I was testing out a new size bottle to see if results changed, (bike was on its stand) and the throttle line was tangled and so it was at like 25ish mph idling, and i clicked the kill switch on and walaa, the engine continues to run for a good 10 seconds off heat and compression? Anyway, that is our theory, there is no other way the engine could run with no spark unless the wiring is faulty. Haven't been able to replicate the event since. If that ain't a demonstration of added efficency (or crappy tomos wiring), I don't know what is.