Hey guys and gals. Fairly new to OG. Have a question about the sumtoy mounts for ff3.i am on the last phase of finishing a 20 ga 870 project. it's at the dipper now being coated in mossy oak original bottomland. I was very excited about the soon to be finished product until I saw the sumtoy mounts. Now I want one. It is really a clean mount. My gun was drilled and tapped for a weaver base looks good and was well done by a great gunsmith. I have seen that the sumtoy has slot in it for variable screw settings. After all that my question is, does the sumtoy mount for a 20 ga 870 also fit the 12 ga 870. Thanks for your feedback.