Coming from a man with a 14.75 2 star on h-bar you need to keep your arms locked out in your giants and keep the post arm tight in the half turn as well go up more on the flyaway.
See you at regionals but I have a couple tricks up my sleeve for high bar so here is a friendly challenge you beat me and I will make you a trophy but just a reminder I have I couple releases and all the videos showing high-bar on my channel are really old videos