RE: AMR Trainer 26
The weight/balance challenge can be very difficult. Everything in the tail requires at least 3 times the weight in the nose to balance, so tail weight is extremely important. Moving the servos forward, replacing the kit's wood with lighter wood for the tail, eliminating the tail bracing, etc are all considerations to lighten the tail weight. Heavier wheels won't help as much as lead in the nose; the further forward the nose weight is, the less you will need. I think the AMR trainers are designed for heavier gas motors (more nose weight). One thing about building, you tend to learn stuff along the way. Your plane looks great! Good luck on the maiden.