Making your own gaskets, I always trace my gaskets out in a heavy paper art book in case I need one later, then I make my own using that template I traced, either you can cut it out and use what you traced then trace that one, or cut it out trace it on some gasket material or use heavy card board paper my personal favorite...like what 24 packs come enclosed in
heres a vid
http://www.youtube.com/watch?v=6rx5hGKt1PY of an old timer doing something similar not my method but his works just as well if you don't have a gasket for a template and need to make one or just use that one after you make it.