I thought about trying to port my own, but I'm not sure I have cojones to do it. It's my only mode of transportation (except feet, and it's 90' outside!).
I'm sure the Pro's (Ryan and Dan) didn't get it right on the 1st try... Well maybe they did.
From a physics perspective, I understand what it takes to do it, but I DON'T understand the repercussions of doing it wrong (except for metal shavings in the manifold).