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?
Yes, it is possible to install a set of water bottle "braze-ons" on a frame which was not originally supplied with them.

It requires a very specific set of tools and parts.

The video below shows how a Rivnut works.


                
            

The second video wexpolains how to install a set in a bicycle frame.