Hi Martin. Sorry to revive an old thread . However I m in the same predicament as you. Bought the panniers & previous owner left the old barrels in.
Was it easy to take out the old barrels? As I downloaded the instructions & they tell you how to put the new barrels , how to unassemble the plastic latch. But never mentions what to press to take out the old barrel.
If you are free please let me know how to took out the old barrel. Thank you