You don't exactly have the right to act all smug about people making inapplicable comments
when you neglected to mention the Context in the first place of this not even being a Bicycle frame.

anyway, I'm out. Can't help you with this, I work on bikes, not pedalcars.

If you decide to go with derailers, this document might be helpful
it contains the Shimano specifications for derailer mounting
http://www.peterverdone.com/wiki/ima...%26_E-thru.pdf

you'll most likely want to only look at the 'standard' mounting on the first page, ignore the later sections on Saint/Zee DH stuff