To set up my 8-shaft Glimakra for tying up the treadles from the tops of the lamms, I need 80 lengths of Texsolv cord. The first step was to determine their length.
The measurement from floor to the top of the upper lamm is 23 inches. Then I need to allow for knotting the cord at both top and bottom. Using the Vavstuga idea of securing the cords under the treadles with pony beads . . .
. . . requires about 4 "buttonholes" of cord, which is about 2 inches.
I'll also need to knot the cord at the other end, to keep it from slipping back down through the upper lamm hole. That takes about 1.5 inches. The other option would to be to put a peg into the end buttonhole, which could be moved if the lamm was needed. Anyway, I added 3.5 inches to my measurement of 23 inches. Plus, I need enough cord to grab it and work with it, so it looks like Jean's measurement of 28 inches per cord length sounds about right.
If I make my cord lengths 28 inches, then my 55 yard spool of Texsolv cord will give me 70 lengths. My partial spool gives me 4 more. Scrounging around in my box of Texsolv cord scraps, I found the remaining 6 that I'll need, so I'm good to go!
To measure and cut the cords, I used a board with two finishing nails as a jig.