I also did a crude mudflap, but then when strida did their own I got 2 (at £4) ... much better ! Its quite flexible so dont effect wheeling and going down steps. I polished the scratch where tubes come together - and accept it. I wondered about using a small clear self adhesive patch. I ditched the rack long ago - I use a paper-boy/courier bag which was the original mudflap.

I put a small rubber o-ring under the rear magnet catch, to stop it rattling.
Put the Seat as far back on its rails as it will go - with heavy leaverage. The platic mounting seams to flex aroung the rails with no ill effects. I ditched the middle screw on the seat mounting, didn't seem to do much and gives easier seat adjustment when my wife uses it - I'd love a quick release seat clamp... and have been intending to experiment with pair of seat clamp quick releases, in the steel straps.

I filed the slots for the handlebar buttons so that they snap in automatically, and now (maybe because of this ? ) they also snap out when folding them - without having to press them. I prefer this as its faster and the buttons still give a visual indication that the bars are in. The clamp holds the bars absolutely rigidly.

Otherwise all standard - and lasting well. I do occationally check screws and clamps for tightness, crank axle bearings seem to need tightening occationally, as do cranks themselves. I keep belt adjusted, if anything, too slack - it feels faster, but it does 'pop' in the wet.