Ok but thanks to this yarn, I've now realised winding it from the weel/spindle unto the niddynoddy is NOT the same as having the measure of the yarn x'D
This yarn was wound on my small niddynoddy, 70 laps of 1m, pre wash. This is the yarn post wash. It shrank about 15, FIFTEEN, %!? It isnt 70 metres anymore, it is 70 laps × 85 cm = 59.5 metres.
I was not prepared x'D
Possibly a combo of all possible parameters. Fibre type (cormo wool with tweed nubs), how I spun (whatever felt fine with low lvl thin n thick), and post treatment (hot hot water gentle squeeze, short cold dip, soak 30min in hot water before hand centrifuging it, dry flat and losing patience, so, blow dry the last with hair blow dryer. If the blow dryer was a factor I'm going to be way more liberal with it because THE SPROINGINESS is soooooo fun :'3 the whole _skein_ together is more sproingy than single strands from most my yarn. Although. The cormo wool likely is big part. So.)