RE: ParkZone J-3 Cub RTF
The prop and the spinner attach the same as with the stock parkzone setup. I'm using a e-flite 9x4.7 prop and an e-flite rubber spinner. The motor was .3 ounces heavier than the stock motor and gearbox. I replaced the parkzone electronics with art-tech 72Mhz electronics. As far as CG, I didn't check It before I started the conversion. I figured .3 tenths of an ounce would not make to much difference. JT.