I'm not sure what would be considered "reasonable" for porting, but it's worth it's weight in gold for some moderate bowl work. I would consider a basic amount of porting to be paramount to a project like this. Not to bash anyone either... It isn't a difficult guess when designing a head, the cores aren't designed blindly. I can't imagine casting a head with a ton of porting still required from a performance oriented company, given the other heads TA has done. The idea is to hit the target market with the basic casting and leave plenty of potential to work with.