I actually asked the same question in the Wild Hare forum. Everyone pretty much said to only use metal geared servos. For a little more than say a Hitec 635, you could get Futaba 3050's which are digital and metal geared. Could also just use 645's or 625's. What engine are you putting in yours. I bought one, but I'm going to sell mine to get something else. I just want something different or bigger. I'm really want to get a Dalton 35% Extra 260 when they come out.