i'm trying out a pair of HFCs, and while I agree with Jayhad on his points, a cheap performer is still money saved. I'm very positive that KSC/HFC parts aren't swappable, the most obvious point being that you can't use KSC mags in an HFC and vice versa, therefore their gas systems will be different as well.
As for propane usage, the HFC G17s (I'm thinking you're going to buy one from Raygis??) are FMU, so they'll handle it no problem. Like any GBB, not maintaining it matters in terms of wear and tear.
__________________
|