I build wooden armadillo traps that use pulleys for the string trip mechanism. Each trap uses 4 pulleys. Some build these traps with eye hooks instead of pulleys, but the pulleys make it work a lot better when the string gets wet. The pulleys are $6 to $8 each individually, but I buy them online for about $2 each. That's still $8 per trap. I saw a Utube video where somebody used roller chain links to make string pulleys. These are # 60 links I think. Wondering about a hardware piece that would suspend the roller links like the cup hooks i use with the pulleys. I could use blocks and a screw but looking for a single hardware piece. The wooden traps work better than metal live traps as they hold the smell of a live armadillo and that's about the only bait that workds for them. Most people who buy a trap catch one in a couple of days.