Nope I havn't and the reason is not far fetched. Since an upvote has been received on the quality answer given to a question, getting an upvote on a comment isn't necessary because the aim of the answer given is to help the person that asked the question so if conversation ensued from that answer its not musings responsibility to vote your comments, rather you can vote yourself and others can vote you if they like your comment.and besides, Musing votes only Questions and answers so voting comments will be out of their scope for now.