The overall size was decent about 0.030" too large on the diameter though. I've redone it in vector format now, and it should be bang on. (I am using a 78 280z gauge as my guide, since it has km/h on it... it looks accurate enough) I will print a trial tomorrow and test fit a last time before sending it out for vinyl.
I also didn't like how the font matched up with the stock Z gauge fonts, the stock font appears to be Arial. I chose Impact instead, it's not a perfect match but I like it better overall... I think. I may yet go back to Arial.
For those making their own, the 20km/h increments are 22° apart.
JPEG attached. ***THIS IS NOT A FINAL COPY SO IF YOU DOWNLOAD IT, USE IT AND IT SUCKS, TOO BAD***
If anyone has other suggestions they think would improve it let me know.