I'm just beginning a loom restoration (home built 1960's 4 shaft jack loom) and while this could really be a modification I'll slip it in before starting my real tool which will be lease stick holders for my Macomber. The restoration is mostly cleaning off the gunk from 30+ years of attic storage. On the front top bar of the castle there was evidence of Scotch tape used to hold some weaving guidance.
On my Mac I fold any paper I need across the bar which works until I use a fan to cool the room, so in fixing the restoration loom damage I thought I'd try and improve on folding/clipping notes to the bar. First step was to drill a hole (using a stop) from the rear of the bar to about 1/8 of an inch from the front surface.
Then sticking a small super strong neodymium magnet into that hole.
That then allows me to use fridge magnets on the front of the bar to hold notes/guides without risk of marking.
Now to get on with some more straight restoration - perfect for a rainy day in Tennessee.