Boost, when used in conjunction with All Purpose Foam Coat both indoor and outdoor helps make application smoother and controllable. I use their products including their hot wire foam sculpting tools to make dioramas for educational venues. Great products, you should try them!
the sled is a good tool for even cuts. the only thing i found about it was it tends to have you move too fast. as long as you keep it slow, it is great.
I use this tool for sculpting pink insulation foam. It does an excellent job. It has a generous length of cord and is very light in weight, allowing great ease of use. The wire heats and cools almost instantly, making it very safe to use.