You might want to re-think the high performance reg. An airplane with an engine with more than 200 hp. (An) being the key word. Though it doesn't say combined hp, since all twins have more combined hp than 200, but the difference in a Piper Apache that has 150hp per side and a Piper Aztec with 250hp per side is that to fly the aztec, you must recieve a high performance endorsement in either the aztec or in a 230 hp C-182 for that matter. Doesn't matter which one it is received in, it is a one time endorsement regardless which type of aircraft it is in. For twins, the regs only consider the horsepower of each engine alone, not combined. It doesn't say that anywhere but, that is the words right from my local FDSO. I personally think it should be combined for a twin, because think about it, a fresh multi-rated pilot can go fly around in an underpowered apache, which is a more compicated plane to fly than a meesly C-182. Granted the 182 may be fuel injected (whoopty doo), but when that left engine quits in that apache, the pilot will have his or her hands more full than when that engine quits in that 182. To fly (in my opinion the less complicated airplane) the 182 you must have the endorsement, but not the apache. I personally think that with a multi-engine rating should come a high performance endorsement as well. But what do I know, I didn't write the regs. Good luck