440 871 supercharger ?

Is the housing flexing with the thicker gasket? Im thinking the .015 gasket wont compress as much as the .030 and possibly keep the housing from twisting or binding on some serious tolerances of a Rootes type blower....?
thats what iam thinking,,,not sure how it worked before with the thick gasket i was using....even though their inst says you can just use a sealant instead of a gasket worries me a little