Any Lisa/CCL users?

Is anyone on the list using the Lisa expert system shell under ccl?  
Lisa is roughly 5x faster under sbcl than under ccl for my application  
(out of the box), and before I spend too much time trying to figure  
out why, I figured I see if anyone else has experience with it or is  
interested in collaborating on an investigation.

(Sorry for the moderately off-topic spam; Lisa has no mailing list.)

Thanks,
Thom