I've had my GP SpaceWalker for several years now, flying with an OS 91 4 stroke with the pump. Nice flying plane. The two weakest points, IMO, are the ABS cowl and the landing gear wire. The cowl cracks continually so it has been replaced by a fiberglass one from Stan's Fiberglass. The landing gear wire is so weak that even the lightest landing makes it spread further and futher apart. I replaced the gear with another set of the same landing gear but have a brace wire with a spring, running between the two wheels. This has ended the landing gear spread apart syndrome and made it look a bit more scale.