I have done several mods to my Tiger 60. I power with a OS 61 fx. With this setup the plane is very tail heavy. I didn't want to add addl weight so I moved everything forward - battery, servos receiver. I even cut off part of the rudder support on the top of the fuse - useless dead weight anyway. The firewall needs to be beefed for the trike gear. the fuse is weak behind the wing bolts.