Originally Posted by
BigPolishJimmy
Really? Perhaps I'm misunderstanding this as the cheap bottle cages I see at the lbs and at wallyworld all have enough room where you can slip a hose clamp up top and down low over where the screw tab is. Again you will want a bit of old innertube over the frame and under the clamp to protect the paint. Perhaps a bit on the jankety side, but completely functional.
Adding a piece of innertube would definitely help prevent chipped paint if using clamps. What I meant is that people see bottle cages with two mounting holes, and figure they have to drill two holes in the frame to mount them.
I once rigged up a dual water bottle holder that mounted under the rear of my seat on my Peugeot. Took an old aluminum fan blade, cut and bent it at the right angle, and attached it to the seat rails so I could reach around behind my tush and grab water. Then I saw a commercially available cage carrier like it. Definitely better than drilling holes in your vintage frame!