Well I did a little measuring last night... Appears as though my corners are ~5.12" point to point, and have a facing angle of 145. The side pockets are 5.7" and are at 110 degrees. Definitely put together for family fun...lol.
The corner pocket facings have a taper to them. Quite a notable difference in thickness from point to throat, (thin/thick).
Seeing as I have to dismantle the rails regardless of how I decide to get them overhauled. I figured I'll pull the cloth from at least one and see how it was done.