I want to change out the pedastels on my boat. The seats are in great shape, but the pedastels' pistons dont work. My front seat stays in its lowest position...Im 6'1" and I felt kinda sore day after full day of boating from sitting and working the trolling motor. I need the seat higher. My question is, any suggestions on getting them out? They are the spring load type, but they wont budge. I mean they feel cemented in there kind of stuck. And where would I buy replacements? When buying something at academy I looked at what they had and they all looked like the bolt down type. I didnt look very hard as I was in a hurry.