I use gauzes in my 1926 Super. The ones I use are quite fine, I just cut them to the same size as a transfer port gasket then sandwich one between two gaskets with a small amont of sealant. I think I have a gauze top and bottom but can’t remember offhand. They don’t seem to affect performance at the speeds I use and have eliminated spitting.
Having just had a look, I only have gauzes on the LH cylinder. I think it was pure laziness but it cured the spitting.
Best of luck, Richard