I too got a new QB78 Deluxe from Scopes and Ammo and I must say I like the looks of this. so, as usual I haven't tried it yet only because It hasn't been completely disassembled and smoothed out. Its been one of my rituals with new air rifles here lately...lol. My plans are being made around the 3000 psi tube and a hand pump rather than Co2 because really I live in one of the freak temperature provinces Nova Scotia. It is nothing to see the temperature be -xx and then +x in 24 hours. Co2 just isnt gonna make me happy i know. I do believe I will be going into this project blind as I haven't read any detailed posts on this conversion, other than shot strings and psi drops, fps and fpe. It will be interesting getting to that part being as picky as I am to detail doing the conversion.