Would love a copy of the manual in any format as I just inherited a GM4000 and not sure how it works. Any idea what temp number equates to 325 degrees? please send to daraspringer @yahoo.com.Hello Nanc
Still have that National Screen GM4000? Me too, and I have a manual. You definitely need that knob on the top platen. Try turning it when it's hot and you won't have any finger prints left!
I can scan whatever I have and send it to you as an image file.
I know this post of yours is really old, but thought it might help you. I was actually looking on some help calibrating it!