upstand

Hi all, first time poster. I am wondering if anybody has any solutions for this without replacing the upstand? Thanks in advance for any advice.

Evening, Just wanted bit of advice about fitting wooden upstand to an oak countertop. I've tried sticking it to the wall using fast grip silicone but even after bracing it and leaving it overnight when I remove the bracing some bits 'ping' away from the wall. The upstand is a nice bit of oak...