OK, I'm stuck.

I'm building an 8x10 camera, and I'm using a brass rack & pinions to serve as the focusing mechanism. The problem is, I'm not quite sure how to attach the rack to the focusing rails. The rack is 1/8" wide & high. I'm thinking my options are:

1. Drill VERY tiny holes (<= 1/16") in the rack and attach it to the focusing rails with really tiny pins.

2. Gorilla glue.

3. rout a 1/8" channel down the middle of the focusing rail (as opposed to the edge) and let friction do the rest.

Am I in the ballpark on this, or is the a better way?

Thanks for all your help.