Any experience with add on ribs?

I am currently awaiting a rib from https://www.keensights.com/. I used them 20 yrs ago +- and had good luck with a solid rib. I am currently awaiting a raised vent rib for a 20 gauge SxS. I have had luck with a pair of SKB 200 HRs-but those are no longer imported. If this works as planned, I will have 20-28-and a 410 set up with vent ribs which helps my shooting.


PULL!
Hal M. Hare