Hi Victoria. Writing here so as to not stir things up. Spud had mentioned early on that the shock on his RX3 was too soft and under damped. JB's issue sounds just the opposite, almost like locked up. The ride on mine is nice, and I'm under 140 lbs. I've thought about playing with the shock, but have had no reason to. Considering the shock is likely from some supplier to Zongshen, their quality control my be rather dodgy. Hopefully Dan can get you on his bike soon. You'll get the full ergo feel and also the ride sensation. I want pics of your post-ride grin. Jay.