When the way to make your post sound less self-promotional is to make it less comprehensible and useful, please go ahead and be self-promotional, i.e. put the l

When the way to make your post sound less self-promotional is to make it less comprehensible and useful, please go ahead and be self-promotional, i.e. put the link in there and be specific about what success people have told you they had using the technique. If you've become shy about self-promotion due to downvoting, please ignore it. Downvoting on HN seems random in the last year or two. Please think only about how helpful you think your comment is, as if you were oblivious to how self-promotional it might sound. Helpful pointers to something you made will always sound self-promotional; there's no way around it.