Ive been thinking a little bit lately about how I want to attach my pedestal seat bases to the boat... I have the plywood risers made that everyone seems to do, but I was trying to figure out how to attach the base to the risers...
My plan all along until recently was to use T-nuts, but then I realized I would have to embed it between two layers of plywood, which might be difficult to get everything aligned. Plus, once its all glassed in, if the Tnuts ever corrode or rot out, then I don't have a choice but to cut out the riser and remake it.
My next thought was just to use lag bolts, which would totally work fine, but my starboard seat has a sliding base which gives almost no room to get into where it screws together.
What I decided on after some thought was to use stainless steel hanger bolts that will thread into the plywood with a wood screw type thread. I can goop em up with 5200 first to seal them up, then there will be 1/4-20 studs essentially sticking up out of the plywood so I can get the parts aligned somewhat blindly and then just install the 1/4-20 lock nuts. The nylock nuts will help seal the threads as well.