A couple posts down I was asking some questions about mounting some SSR's in a PVC box for my application. Well I have come to realize that the basic idea has stayed the same, but with a few adjustments. Instead of all the relays being mounted on the back wall (space issues) I need to mount some of them on the side walls. Now my question for you is since I can't drive screws through to mount them (can't get the drill in there) would there be an issue to use some silicone and glue them down? Should I just hit the mounting holes with a dab or run a couple strips across the back side of the PCB?