Sent my Rem 1100 barrel with Simmons rib off to Keen to have me a bump rib added on top of Simmons rib. About 8'' long by 2'' high. Made a balsa wood rib on top of the Simmons rib to check POI. After shooting a few times at pattern board and changing wood configuration. I came up with what I hope will work. This is a pic of the Simmons rib. I'll post pic of Keen rib when I get it back.