Very good information, two stroke porting and four stroke porting are very different. Check out this on four stroke porting www.mototuneusa.com

 

Aiming the transfers up and and trying to keep as much fuel in the cylinder as possible is a bottom end and midrange thing though. Guess most of that stuff is motorcross based though. I dont quite get the prop heads though wouldn't increase the squish in those areas meaning less fuel to burn at TDC. Eh, whatever works, works though I guess.