YS is a very trouble free engine. All I did was set the high end and it has run 6 gallons without trouble. The YS needs more nitro than Saito? That's not true. Both engines run better on higher nitro. It's just that many people run Saitos on 15% just because they want to save some money. The Saitos will benefit from 20/20 as well as the YS.

Joe