I can't even imagine why someone would use one of the complex string jigs. They seem like something that compound shooters would love.
Complex?
Folks that know me will fall over laughing if they see that! I'm the polar opposite of "complex", and I'd hate to be without my string board.
The most complex thing about making a board is using a tape measure--the same thing you use if you drive two nails in a board or a work bench. Using one just requires being able to count and read numbers.
If you only make one or two lengths, or if you have a workbench you don't mind driving nails into on a regular basis, or if you have plenty of room to store 6' 1-by's...I can see not needing a board. Otherwise, they are really nice to have.
A board isn't required to make a string, but it's very handy and makes things go quicker, especially if you make several different length strings. Using one is less complicated than a game of "tic-tac-toe", building one is less complicated than a boy scout birdhouse.
If you want to get right down to it, you don't need a jig at all, or even a tape measure. Pull off your strands long enough that you know they will work, make one loop, and tie a bowyer's knot in the other end. You can also just measure the strands individually--takes more time that way, but it works.
If you have an endless jig, it works just like driving two nails in a board/workbench, except no hammer. To stagger the bundles, just start dropping a strand every twist or every other twist before you get to the end.
Tom, got the inbox cleaned out and sent you a reply.
Chad