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Imax1 said..
From a structural point of view , I would be worried about putting extendo plates on a wide board where you lever in the straps . A couple cm , OK , but no more . The levering pressure will surely weaken the plugs . Then they will leak . It would be fine on a thin speed board but not a wide board with a big fin that your hanging off the side.
Id get plugs put in , it's not an expensive job .
Yes, I always wondered about that, and anyway a trip downstairs to my garage discovered that I have already the left overs I need to do the proper job. So be it! Before I set out to destroy the Futura, a couple of questions for the professionals on this forum:
(1) In the past, with urethane sandwiched plugs, I always put a couple of layers of 4oz/yard2 (120g/m2?) fiberglass on top. I plan to use the un-sandwiched plugs. Should I bother covering with fiberglass? Is the binding fiberglass/plastic enough to make a difference?
(2) Routing is the weak spot, simply because I never use my router. It scares the hell of me when it turns on, and then I wobble ...

Any tricks to go straight and smooth? I do have a dremel that can probably use a router attachment ...
Thanks to everybody by the way!