I know the 1/2 option can be with a full case or cut, but if I ran a full case, and ran the cylinders off the rear portion instead of the traditional front half, I would conceivably have two bearings working in my favor forward of the pistons at work and before the prop flange. The application would be within a fully enclosed cowling that would see aero benefits due to the rearward cylinder location as well as the much narrower forward portion of the engine yielding an effective prop extension without a real prop extension. Yes, I know of the rear exhaust argument but with proper ducting (not baffling but actual sculpted ducting) the cooling of the exhaust area of the head can be properly managed. So assuming the cooling solved, are there any reasons why one can't run cylinders off the back half of the case instead of the front? And now much extra weight does a full case option really cost after engine mount?