RE: over sizing motor for telemaster 40
I have a Megtech 46 in mine and just perfect for flying on wing will not go vertical but will large loop with a little down run first. Also I put a 11 x 5 on to slow it down with out any wind it will just float across run way at idle. Balance right on spar is best starting point. Manual suggest you beef up the tail if going to use a 61 engine so if builder did not you may tear the tail off.
Rich