Foam cutting help
The pulley system makes it possible to easily cut a taper by yourself…that’s about it. What is your wire attached to? It will stretch quite a bit when it gets hot.
I've got 18" lengths of 1/4 music wire that maintain the tension. Without the wire, my long bow measures 51". With the wire installed, it's 44". Except for some over-burn at the tip, the cut was straight.