From what I can see of the comb from your first picture, it appears to be of a roll over shape, and convex the whole way. Why don't you ditch that shape, and re-do it in a more Late Lancaster sort of shape? That's what the butt plate would seem to suggest anyway.
As was stated earlier, a star shape like this really isn't correct for schools other than Bucks and Bethlehem / Lehighs, and certainly not all of them used stars. If you re-contour the cheek rest you may not be stuck with using that shape, and could go with something more appropriate. Also, from the picture it doesn't really look centered on the cheek rest, but maybe that's the camera angle.
Not sure on the Muzzle Cap. It looks like over 1/4" of barrel is exposed, which is an awful lot. If the cap isn't too long already, maybe you could make a new one and get the front of it closer to the muzzle. 2" would be about maximum length for a MC.
As was stated earlier, I would similarly toss the PB and side plates. Get some blank material, and just design and cut something that is bigger (or at least will fully cover the existing hole. If you want any piercings you'll have to splice in some wood or other material to allow for it. Not a big deal, but I would suggest using wood. You could also fill in the cavity and re-locate it. Yeah there will be a glue line, but most of that will be covered by the PB side plates anyway, so what the hey.