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This time the solution IS definitely final.
Having identified that all the last update provided was some legible MPH markings, without addressing the speeometer innacuracy isssue, I decided to do the job properly.
I cleaned all the markings from the dial - easy enough with a spot of nail varnish remover on a cotton bud - then went out with the trusty RoadPilot MicroGo. I marked the speedo at the significant "GPS correct" MPH speeds then cut out and applied the speed markings from one of the spare MPH stickers from the original set.
Here's the result - neat enough but more importantly GPS correct all round.
Is this the perfect solution - in a word no, but it is final as far as I'm concerned. The downside is that you can't clearly see the markings in the dark - only now evident as the nights are fair drawing in (and it's also dark in the morning when I head in to work) but this is countered by the fact that the Roadpilot's illuminated readout is hightly legible in the dark.
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