I had access to panels from several Scott models. After cutting the plywood to desired dimensions, I veneered the plywood and applied the finish. Then  I used a router with a pattern bit to cut the openings for the dial, eye and tuning shaft. For control shaft holes, a 3/8 " bit as I recall. 

Kent can supply the correct crystal and bezel dimensions for comparison if you like. Your substitute looks nice. First install the dial crystal in the panel. Fit the panel to the set, centering the dial opening over the radio's dial. When all is well, and the panel is in position on the radio, then install the control escutcheons to center on the shafts, so the escutcheons (when you find some) center on the knobs. Your eye escutcheon sure polished up nicely, 

FYI, Scott built each radio upon receiving an order. Scott shipped the radio direct to the customer while the cabinet was shipped at about the same time from the cabinet factory, pre cut for the radio model. The owner (or a local service rep) had the job of installing the radio, speaker(s) and attaching all the escutcheons.

Those vertical brackets you mentioned are for installing the receiver 'face up" in a radio/phono cabinet. That installation also requires a couple short metal pieces that attach to the threaded holes at the lower rear side corners of the receiver. I have photos if anyone want to see a inside view of a Scott Masterpiece in the Mayfair credenza.

David

Interesting that the renderings in the original promotional articles did not even show a tuning eye on the Masterpiece or Super XII. In the collector guide, the various Phantom models and Sixteen with a wood front show the tuning eye sitting above the top of the panel. The variation 4 of the Phantom has a taller front with the escutcheon perched on the top, with almost half of it above the wood! How many of these sets were actually sold with a wood front is a question, there must have been some buyers that did not want a cabinet but liked the look of the wood front. 

I have some scraps of 1/4" plywood so will start by making a mock up panel and see how it looks. There is another thread with much discussion about the Mayfair Credenza cabinet, you posted some photos of the mounting brackets in your set there. Those are the mystery brackets that I had seen in a picture before.

Yeah, some chassis photos omitted the eye. But some cabinet photos for those models show the eye and escutcheon(s) as do the owner manuals drawings.  Those models came standard with the eye tube and the mounting bracket for above the dial. The Scott News, Vol II no 3 of March 1939 has a full page model description for the Super 12 with 2 columns of features including a cathode ray tuning indicator .And the diagrams all show one eye tube. The FM sets had two:  one for AM tuning and one for FM tuning.

I have seen a couple examples missing the eye because the cabinet dimensions could not accommodate the eye above the dial, And a couple such cabinets with very unusual eye locations. (Laureate Grande &  Westwood, as I recall). Do not know if these were factory, or merely retro fit efforts some years later.

The Philharmonic always had two eye tubes. The AM only sets had a 2nd one to show volume expander action. The FM Philharmonic eliminated the volume expander and the 2nd eye was for FM tuning.

The 1941 Scott Laureate was an AM/SW/FM and had one eye for both AM and FM tuning,  a benefit of a later ground up AM/FM design.