Try to host pictures at imageshack.us and I found some wrong sizes on the seat base If you go with 1 and half PVC Pipes only, I dont know it will be the same with 2" PVC. SEAT BASE BLUEPRINT: Item # 8 (3" pvc pipe QTY:2) you don't need that. It's too short. Item # 9 (5.375" pvc pipe QTY:4) It's perfect size but Item # 8 should be in this. I will say remove Item # 8 and add QTY: 2 on item # 9. Here's my cockpit rig. almost completed! You see the missing two PVC pipe on seat base. 5.375" PVC Pipe is fitted all together with front cockpit base. I hope this help!