[addicted2dunes]

One other thing I just noticed is in my first pic posted (with the circles) you could even get away with just sleeving over the red circled area...

And another.... If you did machine it like I was talking about (bung) there probably is no need for the sleeve.

Also, I have seen a lot of people running hydroboost on the trails and they have shortened their shafts and just welded it back together without a sleeve..... Seen tons of shafts snap that way.

Just remember this is just "my opinion," it's your build and your fun, just I'd hate to see someone compromise with safety.