Superstitions and and myths

Ooops – did I really write that "ignorance is bliss"?
I suppose I did.

I didn’t mean it quite like that, of course. What I mean is: words are important. (So why am I writing this blog in English – my English is by necessity a lot less exact than my Swedish is? Well – try g***le translate, and all will be clear... Or rather, don’t try ;-)

Words are important: "it is impossible to use singles linen for warp"; "it is impossible to use handspun for warp"; "if you don’t do [it] THIS way, [it] will not work"; "if your shafts sink when using a CM loom you are a failure"; "if you don’t use a 1/1 lease your warp will not be weaveable" (is that a word?)...

What about this: "it can be difficult to use singles linen for warp"; "when spinning for warp, be careful with the joins"; "this is the method I always use – YMMV"; "when having tied up your CM treadles (or: when you have tied up the treadles, regardless of which type of loom you have), test the sheds before declaring your tie-up a failure – or a success"; "before you have some experience, don’t use too many ends in your threading cross – or: try with a 4/4 lease and see how it works".

Somewhere I have a book about weaving superstitions. A few I remember are:
- if someone comes into the room while you are dressing the loom, s/he has to take a few very high steps, saying (at the same time) SO high shed, SO high shed. (Otherwise you will not get any shed at all, I think. Or?)
- if a pregnant woman sees a (can’t remember – "naked", possibly? ) loom, she will miscarry.
- when you first can see a bit of the warp beam, it is called "happy hole" – but also: you HAVE to weave the warp down in that same sitting. (Otherwise? the cloth will disintegrate?)

What I think I’m really after is: apply brain before "committing". Is it likely that a fat and fluffy woollen yarn will show a lovely lace structure? If I am trying to make a (say) winter coat, will the best choice of fabric be a see-through linen yardage from the drapery section in the fabric store? If I want to dye a light yellow, will the best yarn to start with be black?
And, for that matter: if I have this (new-to-me) threading draft labelled (say) "summer-and-winter", and want to weave plain weave, can it really be done with an odd-even tie-up?

Or, looking at a (new-to-me) tie-up – can I really use drälltrissor when both shaft 1 and 10 go down at the same time?