Hi, I have a customised XS78 and yes they can be converted to take the 88G airsource type CO2 canister. However if that is all you want to do and not bulk fill, it wouldn't be cost effective to go down the MaxZbulk adapter route. You can see the MaxZbulk on my gun below. This was made by Max Balbuena in Honolulu and enables me to use either the two 12g canisters, 88g airsource, bulk fill or use a 12oz paintball bottle as in the photo. Your best bet if you want to use 88g would be simply to sell the gun you have and replace it with a QB79, XS79 or one of the many variants like the Kasu. It