RE: OS140RX
Hi,
I am about 3/4 finished with rebuild of World Model Tai Ji 60 with Thunder Tiger 1.20 rear exhaust/pump/pipe set-up.
I shortened the nose about 1.25 inches to help with the CG (the T.J. had a YS 91 FZ in a previous life, so I shortened the nose to allow removal of some tail weight).
The T.J. isn't a 2M plane but it should be fun. I will run something like a 14x10 APC prop.
You might post your question in the Extreme Speed Prop Plane Forum.