Hi Mike, thaks a lot for the additional information. Seems like I do have quite a bit of room to play with, not a tight fit at all.
Thanks for the reply John, I have seen some metal spinning done but never attempted it myself. I think aluminium is ok depending on the thickness or course..
Well it will give me something to think about! I have never worked with carbon fiber before but feel I should try it sometime as I am sure I would us it for other projects..