One more update to the Nobler. I noticed it flying in a left yaw. (remember I built the firewall with no offset). I have added a 1/8" shim for right thrust to see if this corrects the yaw. Weather had not been favorable for test flight. I would expect it only to fly better. The saito .56 inverted has been flawless in operation. The La. 46 that would not idle/transition inverted has been installed on a Ugly Stick in the vertical position and runs well. There must be something [:'(] in the crankcase, piston, sleeve that directs fuel improperly when inverted. I won't be using any of the La. engines in any position but vertical or horizontal,, never inverted.

Jim