Well, I just went ahead and gave it a try with my 8" Dowidat spoons, some HDPE "rim protectors" cut from a soap bottle, and some soapy water.
Guess what? It was much easier than changing Dunlop K81s on Dunlop rims with tubes and security bolts in days gone by!
Now I wonder why so many of us believed that this simple job requires a specialized machine when all it takes is a pair of spoons and a time-honored technique.
I just ordered my wheel balancer from Marc Parnes and, once again, I will be self-sufficient when it comes to tires.
Now I can again travel in confidence that, if I do get a puncture on the road, I can fix it on the spot or install a new tire myself.