Looking into this a bit more looks like the settings on the wiki page may not be correct.
I have both the D70 and D300 and when I measure using a ruler the D70 measures 40mm from the center of the tripod mount tripod to the lens base (wiki states 36mm). My D300 measures 44mm (wiki states 42.4mm).
I didn't use a micrometer so the +/- error shouldn't be more than .5mm.
Wiki shows the difference of the two cameras to be 6.4mm.
Dpreview shows the difference of the two camera widths to be 4mm.
I show the difference of the two camera widths to be 4mm (+/- .5mm)
So our database is incorrect. I've made the changes to reflect the new settings adding 4mm to those from the D70 on the upper rail.
If this doesn't work let me know - this database is always a work in progress.
Thank you very much for bringing this to our attention.