you might want to try DIY
forum areas.. some are more advanced in skimmer modification.. I personaly would try reefcentral's DIY
guys, they build and work on skimmers alot. just a suggestion.
Ive read alot about mods and building skimmers.. If I had a clue what you were working with I would try to give you some ideas.. :P
I might go hunting around for pic's of the excalibur so I can be more familiar with its design in case you might want some ideas.. ok..
. is it a hang on model or a sump model?