I don't know, it seems a small goal to aim for if they specifically chose 6cm, so it'd seem like it's a (current) limitation of what they're doing. It doesn't s

I don't know, it seems a small goal to aim for if they specifically chose 6cm, so it'd seem like it's a (current) limitation of what they're doing. It doesn't seem like it'd be a limit that'd be too hard to increase though.