I know this is a newbie question, but I just removed the H91 horn from my LE85 (in preparation for installing the 500Hz Tractrix horn i am turning - pics to follow) and peered down the bore. It looks like there is some dust or lint down there, but I'm not exactly sure what I'm looking at. Is there a screen down there?
Anyway, I'm thinking about opening the beast up and seeing if it needs cleaning or whatever, but I have some hesitation about diving into a working unit (I did a freq resp curve with the H91 on and it looks reasonable). Am I just being chicken? Are there things I should know before opening it up? (Like what NOT to do!) Any advice appreciated before I tackle this project.