The OS seems to be very light at 13.2 ounces. Do you think the vertical performance would be really good with a tuned pipe?
I was thinking of puting an OS on my plane because I can go to my local hobby shop and pick one up with a tuned pipe.

My preference would be the Rossi 53, but Morris is out of them and I have to order it. The Rossi is 15 ounces and may will hurt the aerobatic performance some. I would like to talk to someone who is running the Rossi too.

Gordon