raideron, Hi, I don't think the YS has any leakage problems. I have a couple of the 110 and they are great that way. In fact, they are great in every way. But the Saitos can leak a little when mounted inverted. The 46 isn't so bad because the tank is physically lower but the 60 is worse. But that little trick with the loop in the fuel line really works. It stopped mine completely. Man, I really do like these planes. I've been flying quite a bit the last week or too. I've flown my Mayhem, Ultra Stick, UCD60 and 46. The 46 is just more fun. I'm not even real sure why, but it is relaxing, precise, it'll do any stunt, lands very easily and is just a blast to fly. And it doesn't suck the fuel so bad. I just really have fun with this plane.
THanks,
Barry

PS: Apparently I'm a little better with the flat spin landing then you guys. I'm not bragging but, hey, if you can do 'em..???? So far this year I haven't even done one, but the year's early.