I switched from Leights back to CAF today. Aside from config issues as mentioned, RHS models seem to be waaaayyyyy more complex than regular BIS and most other faction mods. They look pretty but it's just not worth the frames imho. Plus it relies on RHSUSAF and RHSAFRF which is a whole lot of mod to have enabled to use a tiny amount of it. Using CAF i'm getting much better framerates, better spawns (ie fireteams of insurgents instead of huge patrol squads) and less error messages from various RHS bits and pieces. Just seems to make life easier :)