Hey, I'm trying to finish a cluster swap here in the next week or so (I've done one before, so I know the basics), but this is a bit different because it is a 200 mph setup... Yeah I suspect the speedometer will read something wildly inaccurate. The one I did before was a straight up 150/5800 for 150/5800, so there were never any speed problems. So the questions are: it's going to read incorrectly, right? And when it does, how can it be adjusted? I'm familiar with products like the DM Speedcal, but isn't that only for gears and tire size changes? I've got a Diablochip (Revolution); can a tune be had for this issue? Car's a 99 GTLE. Thanks in advance. -Ron