Henry's instructions explain that "if your gun came with predrilled holes for the mount, proceed to blah blah blah" If not, you may want the services of a gun smith to drill the required hole.
Mine had the hole already. Yays
The holes :
Test fitted, till Leupold VX-1 2-7x28mm scope arrives. Note, those are one inch scope rings for a one inch tube.
O.C.D. kicked in a little soooooo, spares bag for future use?:
Scope was due to arrive today by UPS but did not. So much for speedy reliable delivery right? I'll post more once I install the scope.