Raider502: Nice looking boat and mods. I've had my 10e for about 4 weeks now and been on the water 4 times. I have a 5x8 Northern Tool trailer covered with 1x2 " plywood and a 1/2" plywood floor in in 2 pieces for easy removal. No carpet yet as I'm still making mods. to the floor for seat and misc. I built up the floor using 1x2 PVC board to allow space for mounting the base and reinforcement around the seat base. I used a similar pedestal as yours and a quick release base and a quick release seat base so I can remove all of it or just the seat. I'm leaving the rear as is except for a padded seat. I mounted the TM in the front with a detachable Big Foot and load the boat on the trailer rear end first. This allows use of the TM for unloading and loading and getting on and off the bank. This works real well.
Now working on building guide ons of 1" PVC for back and front that will serve to keep the boat centered while towing. I like your winch setup and have to modify my tongue area to mount one. There is a cross piece on the V shaped tongue that restricts the crank handle. I'll remove this and run a 2x4 from the frame to the open slot under the hitch that will give me a straight piece to mount the winch. Also like your stop on the tongue. So far I've been using Military Grade plastic ties on mods instead of screws/bolts and nuts where I can for several reasons: no rust or loosening from travel, no loose metal to puncture the boat and easy removal when changes are made.
There are some very nice mods posted on here that have been a lot of help in selecting, planning and preparation.