I am probably canting, just never focused enough on follow-thru before. Also, too long draw length is possible. I dont generally hit my arm, but it has happened if I really extend my bow arm. I use a True Ball release, and it seems to help if I take up any slack in the release cord so that its length is minimum. I think the drawlength is ok, but will definitely check the measurements.
Now that I am focusing more on follow-through, I think I am seeing an improvement.. so will continue.
Thanks guys!