- A5 sheet of something reasonably solid (I used a 0.5mm thick carbon fibre sheet but only because it was spare).
- (optional) Drill
If you are cutting carbon fibre make sure you wear goggles, a proper dust mask, and gloves. It throws up a lot of nasty dust and splinters, which can be very sharp.
Step 1: Make Template
Step 2: Trim and Sand
Sand around the edges and corners. Give it a thorough going-over as you want to ensure all carbon fibre splinters are gone - they are super sharp. Sand the outside corners down as well.
Finally the cut-out portions should be big enough to be useful - I made myself a key ring, 2x bookmarks, and 3 x bag tags (with corner holes drilled for ties). Just make sure you give them all a good sanding and take the corners off. Enjoy!