As you know, his fw is different to yours and has different functions embedded in in, not the least of which is the ability to decrypt the asian JCV files which will crash & reboot the us/eu units. The zoom numbers feature on the main nav map screen pic that you attached is also enabled by his sg/my fw, as is the arrow above the zoom figures, which is a north point as you probably know, useful when the map is set to '3D' in sg/my units. You can use those features with your 1300, but not with the primary nav map in 3D. You must set the map to 'Track Up" which displays in 2D. The zoom figures will then appear above the return arrow as in the 1350 sg/my, but the north point arrow will be slightly more to the right and solid white, not in outline as shown by sg/my on 3d. The zoom figures will also appear in 'North Up' but of course not the pointer which would be redundant anyway. Maybe you would prefer to forego those minor features and have 3D displayed. Anyway, i certainly would.

Also as you know very well, cross-flashing with asian fw is not without risk. If you really want these features that the sg/my units have, that is the only way to enable them as far as i know. Unwise to try it with a new unit under warranty, i think.