Here is the only other picture I have. Its a picture of the 2 fixture boxes I built. The one on the left is for the main barrel channel, the one on the right is to inlet the bottom of the stock to accept the factory savage bottom plastic for the magazine. They essentially work the same, when assembled they have 2 long bolts sticking out each side to clamp and adjust the stock side to side and 2 bolts in the bottom to clamp the stock against the top of the box. I just used some crap pieces of wood between the bolts and the stock to prevent any putting dings or dents in the stock from the bolts.
The box on the left has guide rails for the router base while the box for the mag housing and trigger guard I used a router bit with a top bearing, to trace the inside of the template.
I'm probably going to start the next one this week, home depot is a bit of a trek so it has to wait until I have another reason to go.
Can you post the dimensions of your fixtures. I was looking at building a stock for a project and would love to see what works for a fixture. Do you have to do a lot of work fixing the bottom metal. Or do you have a bit of play as to how tight it needs to be? Great work on the fiberglass, I think I will build a couple of plywood ones first till I can get a decent one made.