I had this plane some time ago with OS 46 and Pitts muffler. As Georgee noted, very pleasant flyer. Main surgery needed in the landing gear: the wires in my kit were bad tempered, like glass, and they broke in the first landing. I bent a new pair from 4mm wire, placed additional grooved hard woods in the wing and added 3mm struts from these wood blocks to the gear. Pants were a little difficult to place after this modification, but the result was worth..

Regards