Is the rhino guard a preexisting part of your style, or something you've just invented? Obviously nothing works in 100% of situations. But this technique, as you describe it, requires the opponent to not react in any way during the time you clasp and extend your arms, move in, push their hands apart, unclasp your hands, and grab them in a clinch. If they react in any way during that time period--by moving off the line, hitting you with a hook or overhand punch, push kick, or grappling--you're very vulnerable. And even if they don't, this doesn't seem to offer much advantage over blitzing with straight punches while moving into clinch range. Not trying to beat up on you, just offering feedback as long as you asked for it.