Sorry that is interfering with your sacred trolling, but for modding the firmware to that though what that is as close to the Garmin platform\firmware\hardware stuffing was necessary functions.
As with the 1490 and 1300, or 3760 and 3790 and 3490. 205W and 465.
800 Series has very little to do with the 700 series, so in this case, the logic of modding is not suitable.
Given the closeness api\code - the economic feasibility of developing a zero to zero OR nonsense
На русский переводить я надеюсь не надо?