I have an Origin 8 propulsion airlight 1 seatpost. It doesn't seem to work properly there is no shock relief at all. I let the air out and pumped it to 200# still doesn't work. Does anyone know anything about this type seatpost? thanks

have you tried less air pressure?

+1 with the bottom of the post on the floor, supporting yourself with your feet, sit on the seat and try and make it compress. if it doesn't compress,
let a little air out. if it bottoms out, put air in. adjust pressure to get the action you want. ride it on the bike. fine tune
pressure.

Thanks. That helped, I'll need to do the fine tuning. Again, Thanks.