Happy to say that my PST (S/N 94606) is no longer sick. Just received it back yesterday and it is working very well, having checked it out this afternoon. In fact, Meade improved the tuning of the etalon. Before, it tuned just at one end of the range of motion of the tuner. Now, it tunes maybe a third of the way from one end of the tuning range so that I can be sure that I can optimally tune it.
My repaired PST has the blue lens.
Best,
Gary
-------------------- Torus Optics 32cm f/6 Dob
Osypowski Equatorial Platform
Fujinon 10x70
Coronado PST plus SolarMax 40 filter
Vixen GPD2 on a Berlebach Tripod
StellarVue SV90T