Technical Drawings for Interstate 75w

Hi,

First of all I am loving the Interstate 75w, thanks Pimoroni for making such an awesome product!

I scoured the internet for fittings to secure the two panels together, in the end I cracked open Fusion 360 and made some simple 3d printable parts that can join the two panels together.

But its not enough for me, I would love to make something a bit potentially over engineered and would appreciate if you had any technical drawings of the panels so that I can fabricate (and share freely) parts that can be 3D printed.

Do technical drawings exist, or are they only available for the Interstate board?