A slight variation on warp weighted would work, but I wonder how it would go with a rigid heddle? Advancing the warp is no problem, after all backstrap weavers do it all the time, and I'm not sure there is a better system than that!

I will have to experiment. After all, its what works for me that matters!
That 2 kgs of Optim is singing out sooooo sweetly that it needs to be dyed, do you think it would destroy my stash-busting if I dyed some? I started spinning a little bit last night - its truly amazing! My yarn is so fine, even on a 1.7 oz spindle its virtually laceweight and it feels like silk. Apparently its supposed to be about 14.5 count

and it makes cotton feel very sticky and coarse - I will have to go find my tahkli and try it.
Cheers, Caroline who's resolution is getting weaker by the minute!