Big (serious?) Ned,

I never heard of that one...........

I actually took this forum's advice and used a 11X5 Prop, a 3 inch low bounce Dubro nose wheel (they come in pairs for about $6) and 2 "light wieght" 3 inch wheels with treads for the mains to keep the prop clear of the grass and clumps grass cuttings.

It really does make a difference because I flew last week with a 10x6 prop and 2.75 wheels without treads

- the wheels were vibrating sooooo much that it inhibited me to accelerate enough for "lift off" speed.

Now my "reconditioned" Avistar w/OS46fx takes off at 2/3 throttle with a long slow "blip" on the elevator and 1/3 throttle for level/cruise flight.

ps - I moved the battery pack just aft of the servo tray for correct front to back CG (3.25" behind leading edge) and cut a hole to slip 3 medium sized split shots soaked in 5 min epoxy in the passenger side wing tip to balance side to side CG .

root