Finger Board Rail Riser and Stabilizer

My friend bought these drawer handles from Lowe's to be used as a rail for finger boards. He needed a riser/stabilizer for it. I designed 4 versions and ended up with this model as the final. It fits the included hardware from the rails. This model works for two different rail which I will link. Bar handle: https://www.lowes.com/pd/Brainerd-Bar-7-9-16-in-Center-to-Center-Stainless-Steel-Cylindrical-Bar-Cabinet-Door-Pull/1000309519 Square handle: https://www.lowes.com/pd/Brainerd-Square-Bar-5-1-16-in-Center-to-Center-Stainless-Steel-Square-Bar-Cabinet-Door-Pull/1000309479