We have over 500 NDI sources on our network.

At this scale the two options for selecting an NDI source in VMIX become clunky.

Two suggestions.

1) When creating a new NDI source a nested listed (Source machine level 1, sources within that machine level 2) option would be useful, similar to NDI Monitor, and ideally a search function

2) When changing a source of an existing NDI input, use the same nesting function as suggested above, or at least enable the mouse scroll wheel ;-)
(Also look at the font formatting of the list, as the current light grey for source machine, followed by black for individual sources is difficult to read on long lists)

M