Originally Posted by dave croucher
So how do you fit a 4" horizontal wheel in a3" wide case?
Take it off...
Seriously though, most of us are used to wheels that have a few grub screws to hold them in place, and as such if they are loosened then it's hard to know the wheel will stay where it should. But with the March, the wheel is indexed, it fits onto a shaped hub, so the wheel can only fit in certain positions. Therefore it's easy to remove, just turn the wheel to min or max focus, align with a mark, and put back on.