pump holder

Mounting a pump to my bike was not possible using the bidon cage mounts, so i came up with this solution.
this is a remix of the original design that has strengthened the centre shaft and added O ring attachments to the pump.
requires two large O rings to attach to the bike, and two smaller O rings to attach the pump to the holder.

The pump is a lezyne brand.
The original design (seat tube mount) turned out to have some problems, with heavy bumps, the back wheel rubbed on the pump. This design mounts to the left seat stay. it keeps the pump cleaner and does not rub under heavy bumps.