david_megginson, #CardboardComputer prototype no. 2 (advanced version) solving the problem 5×25=75.
I cut the plastic cursor out of some stiff plastic "clamshell" packaging I pulled from the recycling bin.
Lessons from this iteration:
- Be more careful drawing the hairline on the cursor next time.
- Precise wheel alignment is very important, and I need to cover that more in the DiY instructions.
I'm going to glue these onto cardboard backings.
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