I'm a huge fan of Trevor Clark's work - RAF Tangmere is getting lots of action, especially these days with all the Meteors about. As most know, he designed them with Horizon GenX in mind, and for some reason, Tangmere works just great, even though I don't have GenX scenery installed.
Thorney Island is another story, however. I have trees all throughout the runways, owing to his decision to make these work with Horizon GenX. I wrote Trevor and he suggested I use ADE to create a "flatten/exclude" - but I'm struggling getting ADE to work properly on my pc, and was wondering if some kind soul would be able to cook up a simple "flatten/exclude" for this to enable the base to work fine in default FSX Accel (no addon scenery). The Horizon GenX packs look good, but times are tough, so I have to curtail any FS purchases for now.