I probably won't be building a rally setup anytime soon, but this thread is interesting. Thought I'd toss out another option to Velcro.
has at least 4 times the grip strength of Industrial Velcro and available with VHB (Very High Bond) adhesive.
Available all over the place, Amazon, iTapestore
We have used it at our aerospace company in commercial for-flight electronics and it holds up to the most brutal vibe and thermals tests the govt required to qualify.
I've had some on the dash of my 990 since 2007 and it's held up to years of direct exposure to the elements.