Alrighty then! Seems vector terrain is more powerful than I thought. I figured I might as well try using an LWM to flatten the problematic bump at the second waterfall at Emma Field. It worked.
I am now running FS9 with UT USA 1.3, Holger Sandmanns CRG, FSGenesis mesh, and my FS9.cfg set at MAX_vertex_level=21 - and no significant issues at any of the GeoRender or LAGO sceneries! If any are interested, I'll upload what I have. Just keep in mind, my work is quick and dirty - not polished like some would desire (including my very self) - but functional.
The sceneries my recent work fixes, at least in part, include:
Bear Gulch (RealAir - wonderful place, about 5 mins from Emma Field - and absolutely unusable with the above scenery combinations! Sat, for me at least, in a 150 pit in the ground)
Orcas Island (FSAddon - didn't have much to fix save a few shore-lines)
Emma Field (LAGO - confusing. Sometimes it seemed to need a total redo, other times, not a thing. In my above configuration, it needed some fairly extensive elevation fixes, coastline adjustments, and the repair of that pesky waterwall glitch. Almost all taken care of, save a couple minor issues)
GeoRender 3 - Diamond Point (LAGO - minor adjustments to shorelines)
I did not fix GeoRender 2 or GeoRender 6, both of which I also own, because the mismatches between their roads and streams and the UT 1.3 roads and streams were rather minor and didn't bother me that much - but a double shoreline sticks out like a sore thumb!
An important note on the above: these fixes are based on running both Holger Sandmanns CRG AND UT USA 1.3. Especially important is UT USA 1.3! If you are running the default terrain, you won't need these. If you are running UT USA 1.21, these will not work for you.
UT USA 1.21 is the current Flight1 installer file you'll get from the Flight1 website. It is NOT the most recent version! and it will take some looking to find the 1.3 update! here it is >>>>>>
http://www.scenerysolutions.com/ut_downloads_FS9.html If you do not install the 1.3 update, my fixes will not help you. 1.3 introduces to significant changes to the Seattle area, in particular changing the altitude of the surface of Lake Cushman by tens of meters, among others!
Those many caveats added, if there is any remaining enthusiasm, please post here.