Here it is with the seat off and the clamp slid down a bit. I put two slits (one cut) in the seat post about 3/4 of an inch down. I had to add a spacer so the clamp would fit and I put a slit in it all the way through. Works great and if somebody 7 feet tall wanted to ride it I could probably raise the seat high enough. Any shorter than where it is at now and I would have to take some off the stuck post.Cool idea on the seatpost. Can you show a detail pic?