With the 4.1mm brass "button" in place, the clamp-lever of the DEC-axis comes awfully close to its fitting, but to no ill effect; in its hard-locked position...
I could've left either the 5.5mm or 6mm in place, for that matter.
The clamp-lever for the RA-axis, however, does not draw as close to its fitting; good, that. But there was another issue to rear its ugly head: when unlocked, the RA clamp-lever rocked back and forth; slop. The threaded hole was tapped just a bit too large for the brass clamp-bolt. I swapped bolts even; no change.
I took a shim of aluminum sheeting, 0.005" thick, and lined the threaded hole from top to bottom and halfway round. The shim does not extend down to contact the brass "button", just above rather. The shim was pressed into the threads, as best I could, then the clamp-bolt was screwed in, then removed. The shim was then conformed to the threads. Next, I greased the hole throughout, and reinserted the clamp-bolt: no more slop, not in the slightest...
It just so happens that I'm not the only victim of Synta's sloppiness. A fellow astronomer, elsewhere, has a "Sky-Watcher" EQ-5, a Synta mount, just like my own, but with a go-to system integrated, and the same system that I could install, but I can't use a go-to mount; too many trees. The fellow is having the exact same issue with his RA-clamp. I then described and illustrated the solution for him. Hopefully, it will work for him as it has for me.
The clamps for the axes are completed...
