The 61 was a GMS so it is a little heavier than the OS. With the 61 the plane needed to be flown in the air at a higher speed to stop it from stalling. When we put the 52 in it it could be slowed down alot more without stalling. As for the tail heavy part could have been possible but we were in front of the first cg measurement and it was very soft in pitch movement not twitchy like when you have a rear cg problem.

The 52 had plenty of power to pull it around, it wan't fully unlimited but it went far enough that any higher is a waste of time. Can't give any feed back on its hoverability because the pilot is only just learning it now, but it would sit there on the 52 with some throttle stick left and the motor was only new and not properly tuned yet.

With the plane first up it weight just over 6 pounds with the 61. I think we ended up getting it down to about 5lb 6oz. If the LG had not broken it would have been probably another 2 ozs lighter.

Another thing that is a possibility of occuring is the bare weight of the initial model. One guy here in Oz went to his local store and weighed a couple of the 72" extras from CMPro and I think there was a 1/2 - 1 pound difference in weight between the kits. This is possibly an occurance in all kits so maybe the one I know of was a little heavier straight up. Not sure but next time we will be weighting everything and doing everything possible to get a light weight plane out of this katana. I will be posting what we do and what is achieved when we get to it.