I didn't like the Perfect Effect set at all. I do dig the PE G1 head, just like you. But I needed something that fixed the combiner's torso arms from untabbing. I sat and watched reviews on Youtube by John Garringer, Baltmatrix, Breaux Man, Tambeyoda...etc etc. The PE head appears to be the same width, but taller. I believe it would work just fine. I know the CW Menasor head looks lame, but I'm okay with it as long as he has these big shoulder vents, and Motormaster's arms locked in place. If you look at the photo in my reply to DeliriousFire, you'll see the clearance of the head between the shapeways part. Hopes this info helps you out.