Any advice on that? Or should I ask this in another thread?
Here is a template drawn by a fellow bolter:
http://www.pbase.com/czechman/image/94465389It seems there are a few variations on the front mount holes. Mine were square which held carriage bolts from turning while I have seen others that have a plate tacked on the top side in between the holes to prevent nuts from turning when putting the bolts up from the bottom.
A search for that topic should bring up several threads and it seems you have a few options.
