double quick release seat post clamp?

QR clamps with long handlebar

Ben, thanks for the review of the QR clamps and the tip on the gritty grease. John Foss (see below) nearly had me talked out of using QR clamps with my Shadow HandleBar. I have double hole (165/137) cranks so I raise and lower my seat often (I’ve stripped 4 sets of Double Bolt clamps; always the bottom bolt) and the QR clamp seems like it would be a real time saver.