1)
I have found that the interference we've been experiencing between the installed Upper Mass and Tablecloth is an actual design error. There is a slight (.017") nominal interference at the problem location in the assembly model (D1000549 'UPPER INTERMEDIATE MASS TOP ASSEMBLY'), pretty much as we have been seeing. This interference was designed in originally (over a year ago), and was never caught. It is quite buried in the assembly. I've attached two section views of the assembly model with the rear Tablecloth Plate hidden, to give a look at the problem.

2)
Jeff measured the distance from the overhead table to the Top Stage Blade tips (with full suspended load) using a steel ruler with the following results.
To left Blade tip: 112 mm
To right Blade tip: 116 mm
The nominal distance to the blades for that measurement is 103.7 mm.
Was this to the top of the tips, or bottom??? I believe it was the tops.
Also, I would like to repeat this measurement, this time to the blade roots.

3)
We would also like to take another sanity measurement (with full suspended load) from the overhead table, down to the top face of the Suspended Mass's Top Plate D1000393. The nominal dimension measured in Solidworks is 18.98" [482 mm]. See the attached sectioned view (3'rd file).