hah, I did the over notch once. lost a roller. so dumb. was a camino 6'er too so they're smaller rollers.
everything you really need to know is summed up in a little thing called peter's buddy hobbit.
google that and it should put you where you need to be for a quick reliable easy and cheap hobbit build. Its a nice dead simple layout. I definitely advise getting in and porting too. even if you just raise the exhaust 2mm. theres lots more you can do. but this is the keep it simple solid hobbit build.