Changing from Trakt to Nuvio Sync

Firstly apologies, i know this is probably a RTFM type of post.

I want to change my Nuvio from Trakt to Nuvio Sync, because i have been having a few issues, and now with the trakt connected device only allowing 1, i think its time for the switch. I do however love the idea to keep track of my watchlist (like its so cool to open Nuvio, and open a old old series, and see, ah i watched this way back in 2010, etc)

So i am thinking, switching over to Nuvio Sync, and keeping trakt inside aiostreams.

Now for the questions part

1.) Nuvio's settings have grown, a lot! what do i switch on/off? just go mental, and add everything to Nuvio Sync?
2.) Most important, the second i switch from Trakt, to nuvio, will all my old watch status be on Nuvio? aka, when i open Nuvio now, and it syncs with trakt, does nuvio itself also save that, or will i have a clean slate when i flip the switch, and if yes, can i sync trakt to nuvio?
3.) can i later sync nuvio back to trakt? in some istances, i would watch something on Jellyfin here and there, and would love to still keep this all in sync
4) is there a better solution? something i am not thinking of?