Buckshot,
Just researched the exact weaver mount for my friends Deerfield, there is no gunsmithing needed, it's made by Weigand, you set the base on top of your receiver and tighten down the 4 screws, then you can mount your weaver style rings for the holo. I put a similar one on my Ruger super redhawk to mount a red dot scope. You can get this from a company called Brownells, their phone number is 1800-741-0015, the part number you need is 957-000-032, cost around $50.00, good luck