4x5 Graflex RH10 Roll Film Holder Dark Slide Dimensions

Hey there!

I have an RH10 Roll Film Holder that unfortunately does not have a dark slide. Could someone that has an RH10 holder please provide the dimensions of their dark slide so I can recreate it? Additionally, the insert is an RH8 insert, if someone out there has a mismatched RH8 holder with a RH10 insert I'd gladly trade If not I plan on modifying the gearing to hit 6x7 instead of 6x9.

Let me know if you have insight! Thanks!