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@Gordon
I don't see there's much of a problem - MOSI is an output and MISO is an input, so they can be connected fine. I do it all the time to test SPI as it echoes back what was sent.
I have done the trick with the resistor and SPI in the past to communicate with the ADNS5050
Using
send4bitwill work for transmit, but doesn't receive so it won't help you to get the result back...