Hey Planebender re powered a magic with an OS 91 4 cyl. Same weight as an OS 61 FX. Talk about something that will torque roll. mounted the 91 4 cyl. rebalanced to 5" back from LE. Only added 14oz. more than Magic with Os 46 FX. Calculated the wing loading and it is still under 18oz. per sq." 17.58 Magic Now hovers at just above 1/4 throttle with the OS 91 and APC 15/4W.
What a kick in the pants this thing it unreal !!!