Quote Originally Posted by Artfull-Bodger View Post
I fit a pair of inserts made from 12mm threaded rod, drilled and tapped internally for 6mm with a corresponding 90deg 9mm hole to allow my standard 8mm raiser rod to pass cleanly through, I then put a 6mm bolt with locknut onto the insert and use the bolt to screw it into the stock, release the locknut and unscrew the bolt leaving the insert fitted.
hmm, that sounds it might be even simpler than my suggestion, so long as I can line up the inserts to meet the riser rods properly.. then again, by the time you are fitting them, you will know top and bottom points for the risers, so can be faily confident of the line in between !