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And I could have saved a few dollars on eBay!!!
But mine came with the line set and trimed out cables.

--"Have you seen these before... or do you have the correct spec sheet for your unit?"

That is an interesting question.
I have a couple of sets of specs and they do not exactly match.

Because my house is long like a shotgun house and the kitchen-family rm is most of the lower level, I wanted a unit with some serious air throw.

My brother installed a couple of Pioneer Units In his Denver house, so I asked about the blower and he said it was not very forceful.

I called Park-Davis the Pioneer distributor, and the woman that answered was super knowledgeable and helpful, she quickly had the throw, CFM, amp draw... Pointed to a floor-mount unit with a more powerful blower; it works well.
Some specs for the floor unit are very close to the wall mount. Some literature touts the throw of the floor mount. I was so impressed, I had her transfer me to sales and purchased the entire system! A good thing because a few days later they were sold out.

IMO when they went to "just in time manufacturing" they also went to 'sometime later specs'.
I had a Ford Expedition and a routine plug change was like pulling my own teeth!
I needed the VIN number for the correct plugs and numerous different procedures for plugs on cars of the same model year. Two-piece spark plugs that occasionally separate upon removal, leaving half stuck in the head... The dealers charge $750.00 for the job if it goes well...
FORD HAD A BETTER IDEA!

Below is a graph of the discharge air temperature with valleys about every hour and twenty minutes for the defrost cycle. The frequency is dependent on the OA temperature, humidity, and compressor load.
That is why the blower changes whenever I attempt to survey the inlet flow.

My new milliamp non-contact meter arrived, fun toy. Checked it on a single LED, 20 milliamps about right... If you wiggle the wire it can change the value; a microamp generator.

--" end disks of the impeller so that you can shine your laser tach on it... is that possible?"
The ends of the fan wheel are covered.

For those speculating in the recycled cardboard market, I will be returning my personal cardboard supply for recycling and the price may drop.

By the way, I have a question for you and it involves something I’m doing that is similar to what you are doing.... I installed a new furnace this winter and it has some fancy control strategy of variable gas and an ECM supply fan that will drop in speed along with the gas heat. This way, it runs for quite a long time at a reduced heat setting as opposed to a control strategy of on and off to satisfy a thermostat.

Here’s my question... Do you have a recommendation of a tachometer that can log speed data? Here is one that I found that I think would do the job but I was wondering if there was a cheaper option.... https://www.amazon.ca/Shimpo-DT-2100-Non-Contact-Data-Logging-Tachometer/dp/B015J3L9HA

Here is what I’d like it to do...
1. Have a digital readout so that I can see visually what speed the fan is running at.... I am going to do what I suggested you do which is mount it exterior to the unit but drill a small hole for the laser beam on the side of my supply fan cabinet so that it can focus on the reflective tape.
2. I’d like it to log the rpm data... perhaps once every 10 seconds for say 24 hours.
3. Be downloadable so that I can create my own speed graph.
4. Have the ability to either run on AC or a battery that will run for 24 hours continuous while logging the data once every 10 seconds.

I have a few different tachs but none that will quite do this.. you have any suggestions?