Attach bottle cage to frame w/o mount screws I'm planning on getting a bottle cage for my bike, but my bike does not have the standard mount screws for one. As I understand it, there are two types of cages: bolted cages and clamped cages. I'd prefer a bolted cage because they are cheaper ($5ish vs. $10ish). Is it possible to drill holes directly into the frame for the bolts (I do have a good bit of experience working with aluminum)? Are there any other alternative methods for attachment, or would I be better off with the clamp cage?

Clamps are easy and reversible - causing little or no damage to tubing (metal jubilee clips might scratch paintwork, but there are plastic versions which work well)

I'm loath to drill holes in perfectly good tubing - I also would be worried about metal shavings falling to the bottom of the tube and causing problems in a bearing race.