Yep, that would be a ~natural retrofit~ attaching those rings directly to a stock Vixen Bar. As far apart as possible is best practice for finesse and stability. Here are a couple examples of terrible (Orion Mount) and decent (mine). Note that the Vixen Bars typically have 1/4-inch thru-holes, slots, etc. down the middle, some/most with detents for 1/4-20 Allen Screws. The spacings rarely follow whole # inches or mm, perplexing. But the stock is easily driller, tapped, etc. as needed. We always had tubs of those at work. And nearly all got sawed down or drilled to meet our needs. We pretty much just used as raw stock extruded dovetail.
I bought a bunch and have a tub at home! Tom
Edited by TOMDEY, 28 March 2020 - 08:16 PM.