RE: world models 50cc ultimate
I vote NO The WM Ultimate was one of the poorest ARFS I've put together and as stated above, it's a royal pita to assemble at the field. A 2 piece wing when wingspan is only 64" - what's up w/ that?
It took me the better part of one year to complete it so many we're the fixes I deemed necessary to make it airworthy. Ironic, 'cause I had a receiver failure early into the FIRST flight so never got to evaluate its flight characteristics.
I got the Great Planes Ultimate in replacement and, WHOA - what a diference!! It went together perfectly is a snap to assemble at the field and flies beautifully. Even if thew WM flies good (which it might), I still vote for the GP version - it's in a different league.