Greetings: I have replaced them with 100mm lengths of 5mm thick perspex (that's Plexiglass for those divided by our common language) cut from a large piece that I picked up at the Puckeridge LF site.
Keen subscribers to this group may remember that my cable-tie insulators failed last weekend, and that I assumed this was due to them becoming brittle in the sub-zero temperatures. I took the mast d