I test flown today my third somethin extra
my first one had an os 70 four stroke
my second one had an os 60 two stroke

this one has os 46 FX and is really funy
the .70 version was nose heavy and needed big wheels for prop clearance
the .60 two stroke version was overpowered for me.

the third one fly great in the flight envelope it has been designed for with the .46 fx

here is a pic of the third one