The scenery should come with a disclaimer: 'Works best with the Red Baron/Geographx 20 metre mesh and topo scenery' but I've tried to make it work without having to spend any more money on these addons. There will be some display issues without these, though.
Dimples:
These are holes around the runway, and are an interesting issue. These are normally caused by having the TERRAIN_MAX_VERTEX_LEVEL entry in the FS9.cfg set too low. If you have installed the Red Baron Entertainment 20 metre mesh then you would have been advised to increase this value for proper mesh display. It shouldn't be necessary to increase the value for a 75 metre mesh, but it seems that it is necessary here. This may be a by-product of the way the scenery is flattened.
If you see dimples:
Open the FS9.cfg file. The manual will show how to find this file in the 'Wreckless Tweaks' section.
Find the line which starts:TERRAIN_MAX_VERTEX_LEVEL=
and change the value to 21.[/quote]
,in X from memory this is a mesh choice setting for the wall

have you tryed using the default sliders set at 20meter -10meter