I hav the origional pedestool bases for the 18. Im just curious how they hold up? The floor is in the process of being shored up and reglassed. It seems like a better design on boats like an x18 that have the square base built right into the floor and the track mounts right to that. Resaon for asking I guess is that I dont want to sit too high nor do I want the seat to ever break loose... Im 6'3" and 240lbs...