Probably would not use it on the R/R Paul - remember that is producing heat, so not sure how that is going to go down with the adhesive.
You might be over-thinking getting the 'strongest' - you will find even the most modest is way superior to Velcro.
I supply strips of the SJ3550 250 with VHB Adhesive with my KeyLess kits.
250 to itself should be plenty strong for those types of applications
Here is video talking about the application combos
And this independent user has a pretty good overview of it and comparison to Velcro
This might be obvious, but here's a really simple installation tip:
Apply one piece to the device you want to mount, then couple the mating strip aligned to that (so you have both pieces mated to each other, applied to the device)
- then remove the backing tape and apply the device to your mounting location in the exact position you want.
Doing this, versus applying each strip independently, ensures you get the exact mounting alignment vs a 'good guess'.
This is my Fuelbot mounted on a home-made bracket and attached with Dual Lock:
