I just got the Escape BC from scubatoys. It's my first Zeagle, so I have a question about the fit. According to the size chart I'm in between L and XL. I've got XL. So, how low the waist harness should be for optimal performance? Let's say in relation to your belly button. All BCs I used before were sitting kinda higher than Zeagle. Logic tells me the lower the better for maximizing the the lift area, is that right?