Anyone that needs to do this to a machine to remember how to thread it, needs a different hobby!!! The 301 is one of the most basic machines you can own and to give it the measles is soooo creepy. I mean, come on now!!
http://www.ebay.com/itm/ANTIQUE-VINT...#ht_500wt_1221
I wonder if they have stickers on their door knobs saying door knob?