changed from feathers to two inch blazers now having problems with fletching hiting drop away rest. I have tried turning cock fletching down but still hitting.What else can be done?

Cock vane up....or slightly out, you can turn it anywhere to get clearance on a drop away. My vane is up and slightly in to clear my cables etc...

My vote? Go back to feathers or a lower profile vane. You could possibly change the timing of the rest. If it has a cord tied to your down cable you could move it up the cable a little bit so it raises a bit later in the draw cycle. This will let it drop sooner. And by a little bit I mean it that way. Maybe 1/8" is all it'll take. But I'd still get rid of the Blazers.