Thanks everyone! Yeah, Nem's has some awsome stuff. I've only tried Hlfix, GCFScape--of course--, and the bsp viewer. Someday I'll try the try Terrain Generator and Batch compiler...
Regarding the blinking lights, they're now working in later compiles, but it's strange how buggy they are... Sometimes they don't work, and don't really look the same after each compile. Probably end up eliminating them, or tucking them in a more secluded area of the map...
@Capt. P/Nemo: Yeah, I found with more complex terrain, there were only "stuck" problems where a gentle/gradual slope met with a steep one, so I'm either just decrease the slopes, or clip as you said
Thanks again!