Cable crosses look really awful until you've knit to the next one, then they don't look so bad. And with 6 and 12 sts to work with, it's harder. But after you're done, pull a little on it lengthwise, and when you wash and block it, the stretching will even out. And a tip - the tighter you knit them, the worse the sts stretch, so keep them loose, even knit with a larger needle on the row before and the crossover row and that helps.
sue- knitting heretic