For the record, I use 30wt in my gun for the gas too and it seems to work fine, only been doing it for like a month or so now. Going to switch to 1.5 or 2 because I know it's better, but the thicker stuff works ok too. I also find it doesn't spray it at all when you shoot
On the madbull propane adaptor - I have it and it works soso. Sometimes it doesn't seal well though. The AI kit is awesome though same price and you get everything you need.