That still looks a little hokey and I would be worried that as the pads wear you would start having interference.
Originally Posted by
AdamDZ
I'd try mount it to the seatpost with a clamp or to the seatpost collar. It may result in the rack tilting forward a bit, but that's not a huge deal.
Something like
this might help:

I like that clamp and that clamp doesn't have to also clamp the seat post, you could used some Derailleur spacers/shims and mount that on the actual seat post below the shock.
http://www.universalcycles.com/shopp...61&category=71