RE: Another Skymaster Viper
I would just add a few more points to what Scott has said about the build:
1) Watch your live hinge lines on the flaps and ailerons carefully. Both of mine have "stuck" due to cracks during flight. I've had to cut back the wing surface twice to prevent this. I think air pressure pushes them tight and the control surface catches a small part of the wing surface. Cut back enough skin to prevent this. The plastic used on the live hinge cracks very easy and will stick up just enough to get stuck on the wing skin.
2) Recheck the glue holding the front windshield in place. Mine blew into the fuse on the 8th flight and made the plane very difficult to fly. Upon inspection there was only 1/16" of an inch of windshield holding it in place. The windshield was cut so close to the opening size it just did not have enough surface to glue to the fuse. Sitting out in the sun made it weak and I nearly lost a plane because of it. I have always cut canopies 1/4" more minimum around the edge to make sure enough glue is used.
3) Hysol a piece of 1/4" aircraft ply directly under the existing landing gear plate and use blind nuts instead of wood screws to hold the gear. The wood screws will easily tear out with a hard landing and take the plates out with it.
4) The glue joints holding the main gear doors air cylinders in place are very weak. Put some Hysol around them and they will stay put.
It flies great! I'm sure Anton will make the changes so it flies many times.