Somewhere on the net, (I'll track it down eventully) is posted this useful information (well, useful if your're toying with weaving patterns and using hand spun yarn anyway):
Yrds/LB Yarn weight WPI
2600+ Lace 18+
1900-2400 Fingering 16
1200-1800 Sport 14
900-1200 Worsted 12
600-800 Bulky 10
400-500 V. Bulky 8
I think I most often end up with 14 WPI hand spun (Sport) but it might knit better as Worsted. My own sheep's fleece tend to be bouncy and these yarns probably punch above their weight.
That would suggest I'd use the 7.5 dent heddle on my Ashford knitters loom for plain weave - and this is probably true.
Just trying to get a handle on some of the variables I'd met with over the past few years.
Aghhh - look at this dreary background now - where did my design go?