Hey Spirit, I use woolybuggers for trout and steelhead quite frequently, both weighted(beadhead) and un-weighted. While I have black, dark & light green, orange, yellow, pale blue and of course, white, as well as some that are more than one color..... purple has always been fairly productive for me. Have never seen a purple leech in real life, but purple "leech flies" (dyed bunny fur) also work well, especially in the river..... don't underestimate purple.
OK Fix. I'll give purple a try. Can't catch any less than what I have been. Could be it'll turn out to be a life changer.
I use woolies all the time too, but I usually drag em behind a casting bubble. I've never tried using one with a inline spinner. You? Whatcha think?