I'm gonna be reinstalling my drivetrain and a guy at the tranny shop told me I would want to use a thick gasket between my Rockwell T221 and the adapter between the SM465. When I separated the adapter from the Rockwell there was an extremely thin gasket no thicker than like 2 or 3 sheets of paper. I'm not even sure I can get gasket material that thin and pre-made gaskets for the Rockwell are difficult to come by. What would you recommend? Use a thick gasket sheet and make my own gasket? Use the thinnest gasket sheet I can find that is close to what was there? Use RTV and call it good? It does not even appear that there was a gasket on the tranny to adapter surface. Is there normally a gasket there?