nope, no twisted stitches, but just not enough 'give' in them. so far from here, ravelry, & menwhoknit.com, the advice and consensus is...
try german cast on for more stretch
try a full row of just knit before the pattern
remember that with multiple yarnovers, i'll have to knit, purl, knit, (not just knit knit knit)
and also got a lot of helpful people at all 3 posts/sites who pointed out that the pattern doesn't equal 150 stitches, so if i wanted actual lined up columns i'd need to adjust the count (and then many proceeeded to do the math for me, bless them), but it's an experiment, so was just going to do it as a random all-over effect.
so many people to thank for chiming in, as usual, so many many thanks to all