Another viable option is 3M Automix panel bond adhesive for fiberglass, frp, and smc. ( I think the number is 08116 or 08115 ) It will permanently bond any hardware you choose, it is so strong General Motors is using it instead of welding parts on their unibody structured cars nowadays. Either way I know 3M adhesive requires a special gun to dispense it, I am pretty sure Plexus does also.