This document was created with KSP 1.12.5, and there may be a chance that you find this page in a decade (or sooner!) with some dated information.
Mod List
Just the ones I've installed manually, by CKAN mod ID
RP-1-ExpressInstall (Provides a mountain of mods including Realism Overhaul and Realistic Progression 1)
kOS (addons nested)
kOS-Astrogator
kOS-KerbalEngineer
kOS-MechJeb2
kOS-simpleJson
kOS Compatibility
All parts that provide avionics have a kOS processor built in, so don't fret if you can't find them in your editor!
Engine Troubles
"Eng. Int." can be a frightening indicator, especially when shortly after its appearance, your craft explodes! This is the game's confusing way of telling you, "The Engine's Internal temperature is getting high!". You can see said temperature in the right-click menu of the engine itself. The solution is basically to dial back your throttle until you can reach a higher altitude with cooler air.