Building a ridgid 250 Sprint for the OL and she is only 4'11" and a little over 100 lbs. was looking at a single Chopper Shox for the seat but kinda spendy and we are trying to keep the costs down and also keep with the Rat bike look. Has anyone used mountain bike shocks for their seat. I've seen it done in magazines and was wondering how well they work and if 2 shocks would be to stiff for a 100 pounder?