The Saitos I had always spit like crazy out the crankcase vent line. The OS .91 and the Alpha series don't vent the crankcase in the same way so they aren't near as oily. There seems to be a lot less out the exhaust too. That could just be perception though. The 1.10 alpha carb doesn't appear to be the same as the .91 surpass-2 but I could be wrong about that. I haven't examined it too closely or looked at the part numbers.