Not sure if anyone has covered this before but I had some KPH clocks and plan to put a converter on the back so the run in mph from now on. Obviously the clocks were showing the km covered so I needed to reset from 29k to 17m (roughly).
I stripped back the clocks and re set.
Once i get a chance i'll post up photos and info for anyone wanting to do the same but if anyone wants advice before then let me know and ill detial it for you.