That sinking feeling that you've finished threading and there are threads left! Six! I thought this would never happen because I thread, then recount before knotting, but it happened anyway. So I went across all
466 threaded heddles, counting the threading pattern for this overshot draft. I put colored string section by section to keep track of what I'd checked. My error was in the center, on one of my 28 thread
repeats. The center repeat was missing the six threads left over. So, what I believe I must do is pull out the threaded heddles to the left (or right) of the bad repeat, fix it and rethread half. Do you think that's right? I've never had to rethread, so wanted to run this by you. My problem is that I warped front to back, and I believed I must have had too many threads on my warping board because I always double check my threaded heddles as I go. Now I don't have yarns left. But I think I could just eliminate one of the eight 28 thread center repeats. It's a 20" wide runner so that would only change my width by a bit over an inch.
Does all this sound right to you?