I like the novel approach taken for the cutting surface. I was after a bit more info though:
Are you going to supply spares as accessories? - I primarily cut cardstock and for a while used glass for my cutting base, whilst totally transparent and cleaned after every use it eventually got etched to the point that it needed to be disposed of and replaced. I can only assume the same will hold true with silicone.
What is the spacing on the grid? Some of the renders have 2 x 2 sections and some 2 x 3 so I don’t want to make assumptions
Whilst understanding that it would totally invalidate warranty and safety classification… Would the E2 enclosure construction theoretically allow me to modify the unit in a non-destructive (ie reversible) way so that the silicone mats could be accessed from underneath the unit? (I loved the hackability of the E1 but am drawn to the power, cutting area and finesse of the E2!)