I thought the pilot seats were a little unnecessarily heavy. So many drill bits later I made them lighter. The holes you can seen continue all the way up and down on th base also..The result was I made them 1.5 lb lighter. I have a hard time saying this was really worthwhile. I have considered an alternative benefit. With all these holes the seats still seem as every bit sturdy. But they have to be weaker right? So hopefully in the event of a parachute deployment, maybe these lighten holes will help give a little bit and provide more cushion… Kind of like a cirrus seats. Maybe ? Maybe not. When I first posted pictures of the seats many people asked me what it look like when it’s done… So without further ado here are the back of the completed seats…