Already bought the panels if I have the 2inch of the wood flat then I technically have 50mm is this long enough for the hex bolts?
If you mean 2x1, there is no way you can use that, it's just not strong enough laid flat. Vertical, then the bolts will split the 1" width.
Can you recommend some tape please?
No, I have never used, or needed any. How much over-lap will there be?
