It's a bit hard to explain, but when they park without my help, and sit a tad high, when I go to switch them back on, they keep travelling down for a split second then start the upward stroke as normal. If I re-adjust the arms on the spindle, the wiper blades will hit and run over the windscreen seal then travel back up. It must be the timing in the wiper motor itself that needs adjusting. Not a big issue for me, as long as the wipers work well, that's all I care about.
Nope, just have to re-drill 3 holes in that metal plate that holds the original wiper motor and all the original zed arms and linkages bolt up. A little wiring is needed; just make a new in-line plug in from the original loom to the new motor. I'll try and find the thread on here somewhere..