Before installing servos, I always lined the wing saddle, stab contact surfaces with thin foam tape for a tighter fit, also for some shock absorption.

The kit comes with a very nice threaded tail wheel assembly, all you need to do is to screw it onto the bottom of the pre-threaded rudder post. Easy as 1-2-3. Unfortunately, "easy" is not my middle name, plus I like "blings" on my planes. Therefore, I ended up using my usual gold Nishioka tail wheel assembly. Although, it cost me 30 minutes between drilling and gluing the parts, but I think the end result justify the extra effort.