I line out and insulate shipping containers, (both 20' and 40' containers.)
To avoid condensation problems in lined-out containers, its best to have polystyrene insulation touching the corrugated sides of the container. This means, cutting strips of insulation in a 'dovetail' shape.
The VEVOR hot wire cutter does the job perfectly. It was very very simple to put together, and with the variable controller, you can set the cutting wire temperature very easily to be just right.
It leaves a smooth, dust free cut, which is extremely consistent, and very accurate.
I am impressed - the quality is good, shipping was fast, and the price was cheaper than anywhere else.
Very very good.