Garmin offers an insert, part number 010-12563-01, that replaces the standard insert. It is intended for users of the external battery pack. It changes the mounting process from rotating the unit, to using a locking arm, so that the 1050 doesn't have to be rotated. I don't know if it would work with third party out-front mounts, but you could check it out.
I foresee several bike brands, and K-Edge, making new out-front mounts. And kicking themselves for not thinking that bike computers would never get larger than the 1030 / 1040 size.
