" Incredibly slow" ??? I have no previous experience with foam and was trying to find info on internet what is the normal speed to no avail. So i did some experiments heating more the wire and going faster, slower and so on. 200mm/min gave me the best quality/speed relation .

What you say is the normal speed for this?

Why i have to push the wire into the foam, this means the cut will lose precision? I will not be cutting big blocks all day, i am cutting intricate shapes. if i would be cutting big blocks all day i will make a cutter with 20 wires heated at once, not one wire.