RE: Katana mini
The KM by Precision Aerobatics is manufactured extreamly well! Laser work is top notch. Entire airframe is well engineered and solid. I tend to build "old-school", resulting in a flying weight near 30 oz. At this weight, the KM wont flit around like a moth, but it does perform like a First Class Pattern Ship...and more!
A few areas to save weight: Instead of using servo extensions, solder on servo wire to get the lenghts needed. Consider using the supplied hinges instead of "Dubro-Mini" hinges(I cant stand CA hinges). Pushrods: Test the pre-installed Z-bend's for security( This is noted to do in the instructions). I re-fastened ALL the ends with string wrap and glue, which added weight. Since I never built or flew an electric before, I beefed up the gngine box to front fuselage former with triangular stock(as if I were mounting a OS 120).
AXI 2808/24,CC35,TP3x2100, (Shaft mount)10x5 prop has worked fine! However, this motor will NOT fit correctly(outside diameter contacts motor box/frame) IF you wish to mount via the firewall method instead of the stick-mount.
Control throws: High rate...Set it up for the max! Low rate...very little deflection(3/8 to 1/2) in elevator and aileron is needed for first flights/trimming/etc. Expo...PLEANTY!!!
(I am wondering if the KM would be better off running a 25amp setup. Might build another to test this.)
Bottom Line: Made VERY well, strong and light! Flight: Will take everything you can throw at it! IMO the quality justifies the price!
Good Luck!
Tony