switch which enables easy on and off function so you can use both hands to cut foam. A fence specially made for the Proxxon by

a third party is better than using the supplied guide due to the larger size and full handle for mor more cand easier control

of the foam.  An approximate estimate of the extra utilities would be about $60 if you were to buy them separately.  

I have also listed a like new book for the serious hobbyist or crafter who wants to learn all about shaping XPS foam.  Search the title

BUILDINGS: Tabletop Terrain from XPS Foam.