It's great to see someone posting in this thread again! Congratulations on your success! As far as stopping mid-orgasm, in my experience, that mostly requires effort from your sub. When cumming, I mostly try to relax and just let my body respond to Brosco's command, but when I have to stop mid-orgasm, I have to use all my mental and physical efforts to obey. When Brosco gives me a good workout in O-control, muscles all over my body end up sore the next day from clenching to stop the O's.