Guys, why wont a ST 2300 engine work in this? A Pitts type muff would fit if the pipes are cut and re-welded to match the curves needed to exhaust it properly. Did someone say the prop diameters start at 18 inches? ! [ with this engine?] The next size ST down is a .91 and thats too small for us at 4500 feet. If any of you guys are trying to put a ST 2300 in this plane , please post all your findings ASAP. This would make a nice winter project. Will order as soon as I get some feed-back. MM PS, How about a retractable tailwheel for this beast.