i have the same problem!! although i have a carbon gooseneck adaptor on my SLX and i can normally interchange 3 different carbon goosenecks with 3 different brushes on the end but its stuck solid into the adaptor!!
ive tried loosing the clamp totally and gently trying to twist it off but to no avail!
so what do you reckon the solution is without breaking the damn thing??
ive got 10 days off now so im gonna flush both my SLX and CLX poles out with water and take my tank out of the van and give it a good rinse out!its got bits of crap in the bottom and some resin!
many thanks
dazmond