[Some comments in response to this post concern repair of the Adjustable Bed on Universal I -PM]
I have what seems to be an older model SP-15. It looks exactly like the photos of Vivian Leung’s SP-15, which I have swiped from Briar Press and posted below. It only has four grippers, and the roller height adjustment is a bit less evolved than the later models, which have a pin that intersects the roller height adjustment knob.
Simply put, I cannot get my rollers to adjust high enough. The best I can do is a quarter inch stripe on the roller adjustment guage. And when I have the rear form roller adjusted to its highest point, it no longer makes contact with the drum, so not only are they too low, but they seem too high as well! I spoke on the phone to Fritz about the knob problems, and he conjectured that perhaps someone had drilled into the well that the knobs sit in because perhaps at one point, the bed was missing the extra plate, and someone couldn’t think of any other way to get the rollers low enough. He thought a quick and dirty solution might be to stick something in the holes to raise the knob a bit higher to give it the range of play I need. Fritz, you were so generous with your time on the phone, I’d hate to bother you again, but I neglected to mention the drum issue when we spoke. Maybe this is a significant clue. I wonder if some adjustment to the carriage would fix both problems.
One last problem, which Fritz had a solution for, but since it’s such a common problem with SP15s, perhaps there is another solution out there: when I tighten the allen screws of the roller adjustment knobs, it does nothing to keep the knobs from slipping. Fritz thought the threads were stripped, and advised plumber’s tape. I haven’t tried it yet, but will the next time I feel brave enough to tackle printing on this press again.
And I am absolutely hiring you to work on this press, Paul, when you come up to Seattle in October.