Sounds lke you have most of it cleared up. I would not worry about a bit of play on the rudder hinge, its common with most robart or flat style hinges.

I would do the lateral balance and maybe move the CG forward 1/2 inch and fly it again.
Some planes will give you an extra spin, especially with an aft CG. Its a bit scary when it happens, when down low.

Whats the weight? is there anything extra you dont really need in there? like smoke etc?