Not you...behind orifice! Yeah...Jeeze Duckie...not only are the stop collars in place...but the set-screws as well??? Get your allen wrenches out....COMPLETELY remove the set-screws....spray the WD Specialist on it and beat the crap out of it tomorrow....(just imagine coming home from a date night with Poboy. and my face on those collars.....you'll either break your hammer...or they'll move....) ....and THEN ....(just to feel good)...you can burn the restaurant check I stiffed you with.....REALLY....I DID. forget my wallet.....shhhhh.(on purpose! )
All set screws are removed except for the ones for the sprocket they wont move at all.