The title says it all, I can hit flat bars, up rails, flat boxes, down boxes, rainbow boxes, but for some reason I cant hit down rails properly. I can pop and get on, but i either slip my edges and fall back onto the rail, or I can't lock my front edge well enough. I think my body position could be part of it,
any tips/pointers at all would be appreciated, +K will be given!
Yeah you gotta get your body over your feet and adjust to the slope.
If you always think that your feet should be wider than shoulder width then that should help adjust. If you go on a downrail your back foot needs to be behind you in relation to the rail, which will pitch your body downwards naturally.
Look at this guy:
You can see that his hips are aligned with the rail. That means he has corrected his weight to be balanced on top of it. You're just making the mistake that you aren't getting your body into the right position - happens to most people when they first do down stuff.
You'll be fine. Get it once and it won't leave you.
I used to have the same problem when I first started hitting down rails. I tried to hit them just like flat bars, and would slip back out. And damn, those falls hurt. But just keep going after it. Like Bishop said, once you get over the rail once, you'll have figured out how you need to hit it. And eventually, it will become like hitting a flat bar; you don't need to think about it.
Just think about getting over the rail. The concept is similar to that of an up rail. You don't just jump right at the rail like it's a flat bar because that wouldn't work. It's just more difficult with a down rail because it is committing yourself forward of the lip of the jump, not back. Just remember to get your weight a little more forward off the lip, and you will lock on and slide it like a G.