Hi danny777,
Yes, the gap between the snubber and the belt cannot be adjusted anymore in the newer design.
About the rear wheel wobbling issue, it can be caused by:-
- a bent rear axle;
- a bent rear wheel;
- a loose bolt of the rear joint;
- loose spokes if you have alloy wheels on your Strida.
[url]My Strida SD (Sport Duo) - #14 by Amuro_Lee]