Altoids tins are great for all kinds of projects, but sometimes things won’t quite fit into a single tin. You can always look for bigger tins or cases, but for a recent project (adding a headphone amplifier to my Altoids Tin Stereo Mixer) I chose to make a “Double-wide” version by attaching 2 tins and was very happy with the result.
This Instructable showcases pop rivets (also called ‘blind rivets’) as a way to fasten thin sheetmetal and other materials together, permanently. If you haven’t tried them before, make a small investment in a kit and give them a try!
Naturally, there are multiple ways of doing things, so take these ideas and add your own.