[blykins]

I use 1-piece gaskets, but you have to make sure the gasket matches the pan....i.e. some pan rails are perfectly smooth and flat, others have embossed patterns in them for strength. If your pan rail is embossed, you need to use a flat gasket. If your pan rail is smooth, then you can use a flat gasket or a gasket with the pattern that sticks up. Hope that makes sense.