Of course - NOW I see it - thanks Chuck.

In essence, adjusting the "finder set screws" to make it orthogonal, is just like adding shims to the OTA for the same reason. So, if I can't get the mount aligned after a few tries, work on shimming (adjusting set screws) of the finder, and recursively - finally - get the (mount + finder) perfectly orthogonal and all aligned on the pole, tolerating the OTA being left off-centre, in the process.

I see now, that is a lot easier than futzing with brass shims with the (Mount + OTA) alternative.
Of course, the end result is perfect GOTO for the finder, while the OTA field - and thus the camera view are left permanently "off the mark a bit". I can now see why Roland used that procedure, since he might have only been interested in quickly field testing a mount prior to shipment, but that is not something I would desire as a regular "field set up". Although, if the OTA is not that far off, it might be tolerable - just.

SLIGHTLY OFF TOPIC:
By the way, I find adjusting finders in "double ring mounts" a real ain - 6 screws, and possible dents or scratches on the finder tube!

I found a much better method for the tiny 7x finder on my OTA. I removed the front set of 3 screws from the front ring mount, and put a suitably thick O-Ring on the finder front end, so that the finder fit snugly inside the ring mount. This O-Ring then acts like a "pivot bearing" - like on a large machine gun bipod (e.g. Brenn Gun of old) - so all I need to do is adjust the one set of screws at the rear ring mount, which causes the finder to swivel around on the front O-Ring. I get a lot more precise adjustment, quickly and smoothly.

That could be done with similar large OTA ring mounts. You would need to buy something like two huge O-Rings (like those used on "needle work stretch frames" from hobby or sewing centres), spaced an inch apart near the OTA dew shield/corrector, and then a small air inflatable tire tube in the front ring. Fill it with air using a bicycle pump so it grips the OTA in the one inch channel, between the needle work frame O-Rings.
You could probably devise a similar "filler" with rigid foam rubber, or sliced rubber pipe insulation formed into a donut, instead. Now you only need to futz with the rear mount ring screws to get the OTA orthogonal.
Wish somebody would make this a product. Sure beats adding brass shims to the OTA mount rings!
I think that would speed things up if Roland wanted to always have OTA's quickly orthogonal, and tolerate the finder being slightly off centre - which can be squared up with the OTA much easier, upon completion.
Probably not a very common issue for the OTA, but finders on OTA's get bumped and misaligned after almost every trip.

Joe