On the pedestal seats would they not be bolted thru with a t nut? No expert, pure ignorance here.
The bases are 2 - 3/4" marine plywood (left overs from my stringers) glued together. I'm going to use 1.5" screws going down into the base and put 5200 on them. The holes in the pedestal are 3/8" so there will be 6 heavy duty screws holding it down. I thought about doing the bolt through but decided the screws would be more than enough.
The original design had a steel plate under the deck with bolts coming up from under the plate. It was heavy duty but those holes in the deck catch up with you eventually, at least in the case of this boat it did.