Thanks for all of the great information. I purchased the OS 91 (23.4 oz with muffler) when I ordered the plane, I thought the OS 120 would be to heavy at about 30 oz with muffler.
I use J-B Weld to assemble the carbon fiber rods, never had a bond failure with it, but have had failure using CA.
Hope to have her in the air on Sunday to give the FuntanaS 40 a rest.