OMG this is amazing! With what version of the game are you making these adjustments.
I remember SLAYER's Ultimate Patch, which combined all of the best versions of the level geometry files. Are you using that? It would save a lot of work.
I know of quite a lot of more flipped surfaces. It would be so awesome if you could fix them all!!
These fixes definitely deserve their own thread. Please make one!
I knew about these faults. Especially Nr. 1.
1. Gate is invisible (I looked behind the gate and it looks like it's not a flipped surface, but perhaps it also has transparancy enabled?)
2. White textured part of the building
These textures are supposed to be there:
3. Weirdly textured rainpipe.
I don't know if you can fix them, but maybe you can look at these?