My Mistake!
I ordered two Panasonic KX-E Series printwheels from Typewriters.com, but, unfortunately the KX-E Series wheels would not fit my KX-R Series machine. It was totally my mistake, as I had relied on some false information that I had received from a typewriter forum, so I accept all blame. Since the service, communication, shipping and quality of the wheels was superb, I returned them to Typewriters.com without a return authorization, and with no expectation of a refund (again, it was entirely my mistake - not theirs!). I just wanted other customers to be given the chance to purchase these superb wheels.