We have run 23x31 M3s and MZXs. When we switched to using only S-Mesh we sold the M3s and only use the MZXs. We did this to keep everything the same, because had more MZXs, and the M3s had a higher resale value. Also moving them from room to room, in and out of the exposure unit, dip tank, etc. was just easier. To boot, if you are not a klutz you can hold more in one hand when speed is essential.
We have done it with and without the rollermaster and I never want to manually stretch a screen again!
