I generally set off-contact like this: Lower the screen and feel through the screen to determine about how much adjustment is needed by pressing down on the left, right, front, and back, noting if the screen tilt is also out of plane. If it's even left and right, but off front to back, adjust the tilt as necessary. If that increased or decreased the off-contact, loosen both bolts and raise or lower the off-contact. Tighten and check again by pressing down the screen. You might have to go back and forth both with the off-contact and the screen tilt a few times if it was off a lot, but I'm talking about a minute or so per head, and that's only if it's pretty far off. If the art is short but wide across the shirt, or if it's a heart print, I only adjust the screen tilt as much as necessary to get the off-contact in the area immediately around the art correct. If it's higher at the back of the screen, I'm not too worried about it. It's not necessary to have everything EXACTLY two pennies, or a quarter and a penny, off-contact, all around. "Even" is one thing, working yourself into a lather is something else.
I have to adjust my off-contact more often that I think I should, frankly, but a printer on another forum with the same press suggested that using square-bar MZX roller frames, which he and I both do, had a bearing on why placing two different screens into the same print head would yield different off-contact. I would imagine that you'd get the same with statics that weren't all perfectly flat. Sometimes I have to make very few adjustments at all, sometimes it seems like they're all way off from the last job.
