So as I'm getting into straight razor shaving I've read that you should keep your strop as taught as possible when stropping and with very light pressure. But some videos of old barbers strop with enough pressure to kind of bow the strop down. Basically the exact opposite. My dad who used to watch the old barbers shave said thats the way the ones he watch did as well. So whats the deal who's technique is better the barbers or the ones giving out advice?