Originally Posted by RalphLambrecht
I like the Seal but don't like how the nuts, holding the linkage arms together, come lose all the time.
Sounds like either the wrong sort of nuts got on the press or the nylon locking insert has been worn from much assembly/disassembly.
Stop nuts are available at most hardware and auto-parts stores. The ones on my press resemble:
f-Stop Timers - Enlarging Meters