For the roll you just developed of mine, I'm planning on using my 6x6 carrier and tape some black cardstock on the sides to mask it down a little. I might use the other enlarger and use the glass carrier, but I don't know if I need to. I'm not that concerned with flatness and the same quality I am with other rolls. (yes, I'm doing them as B&W and also using "other" methods for color).