You know when you can't see the wood for the trees ?
I found a quick solution, although far from perfect, that uses the exsisting pannier rail.
First of all I stripped down the pannier rail, by removing the two nuts and bolts:
Then I took the rail off:
I haven't got a metal box to put on just yet, so this will do for demonstration purposes:
It would just be a case of finding a metal box the correct size, drilling two holes where the bolts go, and bolt it on. Easy !
Not ideal, but a quick fix for those of us who don't ride with our panniers on all the time, and want a bit more space for a decent tool kit, puncture repair kit, etc.
What do you think ??