Etch the code onto metal sheets? The CrafsMan has a DIY video on how to do it, he's also just a wonderful treat in general. https://www.youtube.com/watch?v=4tY

Etch the code onto metal sheets? The CrafsMan has a DIY video on how to do it, he's also just a wonderful treat in general. https://www.youtube.com/watch?v=4tYMUqsVhfc https://www.youtube.com/watch?v=4tYMUqsVhfc