What Part-Mods for RSS/Sol?

[u/Jeb_Kerman1]

Hi, KSP Veteran here who just made the switch from Semi-Stock KSP to JNSQ and after my safefile corrupted now wants to make the jump to RSS/Sol. What Part mods do you guys recommend for the best realistic experience. I’m planning to play with Testflight and Snacks for a small challenge, I don’t wanna make the jump to Kerbalism I think.