This might be a good opportunity to review the different grades that K&S put out if anyone knows for sure what they are. GM, SGM, O,OO,OOO, something like that. I think the GM stood for "gas model" and SGM was "small gas model" and was lighter than the GM. The 0, 00, and 000 were much lighter grades similar to tissue? Feel free to jump in and correct me!
Type at you later,
Dan McEntee