[seningen]

Originally Posted by Jamesp

I'm not so sure. Round holes are much more structually efficient than square due to stress concentrations at the corners of square holes, not to mention the corresponding reduction in material. Bolt holes should have a minimum of 1.5 times bolt diameter to edge distance for similar reasons. Don't get me wrong, I'm all for owner inspired redesign, I've drilled holes in my intermediate shaft, but the modification should take into account engineering principles. So +1 on stepping out and making the mod. Just the same, the big square hole with the limited bolt hole to edge dimension is outside my comfort zone. I do give seningen props for making the mod. I hope it works well.

No props to me - I grabbed the photo from the forums.
A set of camber plates "fell into my lap" -- so that is the route I will be going :-)

Good comments on the square vs round too.

Mike