Like i said 'Garmin giveth etc ....' and cross flashing in often a trade-off in features. It's quite personal though, in fact i generally haven't been happy with Asian fw overall on most units but have been with SG on 765. None of the Western JCV files are without issue.

The small so-called 'full' D3836110A.JCV SplitScreen [which is for nuvi xx and SP apps] for NA 2015.30 will work very well because of the Asian fw being natively able to parse the .jcv type, but the file is small without very many views although it will display more correctly on the navigation screen than either the fullscreen or big split. If you press the turn arrow to preview it will show stretched out in fullscreen and quite fuzzy though.

The big D3191150A.JCV [SplitScreen Full version for 2xxx] is the one i suggested. I can use the big splitscreen from my AU 2xxx/3xxx devices here and it works in 765 running SG but still has issues. It will slide in slowly, partly or not at all sometime on the nav screen. The 'preview' will show it as the correctly proportioned half-screen and centered with white either side, but i still prefer it over the fullscreen.

Personal preferences ......