I never had SONAR 8/8.5 so missed the boat on Lexicon Pantheon with SONAR, but as I was just about to uninstall "Pro Tracks Plus 2.2" that came with my GNX3000, I backed out of it since I saw "Lexicon Pantheon" in the uninstall listing. Since this is a CW product, I am not sure if it can be used with X3 (or worth trying).
 
So, I am sitting here looking a Pro Tracks Plus and the vaunted Lexicon Pantheon wondering if there is a way to use it in SONAR X3 (the plug-in says it is DirectX version 1.1 from 2003), or should I simply uninstall the program and forget I ever saw it? Any thoughts?

It will probably only be a 32bit DX version which means it will not be available to 64bit SONAR. It may work in 32bit SONAR.

Good point. I got more caught up seeing the name fly by than applying logic to the situation. I'll pretend I never saw it... can't miss what I've never used.