Ok, hopefully this question has not been asked too many times. I plan on placing plywood on top of my rear seat and attaching a pedestal base using toggle bolts. My plan is to attach the plywood with 6 toggle bolts, 2 on the left, 2 on right, and 2 in the middle. My question is should I just attach my pedestal base to the just the plywood or should I attach it through both the plywood and seat, which would require additional toggle bolts? Also, I used 3/4" for my front deck, should I consider using 1/2" for the rear or stay with 3/4"? Thanks in advance and I'm sorry if this questions has been addressed before.