The proxxon is a great tool for foam modelling but the default cutting fence is woefully short and unusable for foam more than a couple of centimetres thick so I made this simple and easy to print fence. It comes with a large handle for holding the fence steady as well as a slot to allow for angled cuts.
I have made 2 versions of the fence at 20cm and 24cm long as a compact version and also a maximum printable size version on my printer but I'd be happy to alter dimensions if you'd like something a little different.
Any questions feel free to ask.Enjoy :)