For those with RC12R5.x, I have a servo question. I've read a number of posts that state that the Futaba S9650 is a direct fit with the existing chassis holes. How about the JR Z3650, would that require either drilling new holes or using servo tape?

Also, how durable are the plastic gears in the Futaba? Are most of you upgrading to the metal gears?

Just trying to plan my purchases, thanks!