So how are you supposed to mount a DiNotte tail-light to your bike if you can't use the seatpost? My bike has a Carradice Barley seatbag to carry my gear, and it makes the seatpost totally unusable for mounting tail-lights. I've mounted my Planet Bike Superflash to one of the chain stays, and I've got another tail-light attached to the rear strap on the Barley. But I can't see a simple way to mount the DiNotte if you don't have a seatpost or a rear rack.