retrolefty:
That will work but there is an easier way. On the UNO board just jumper the shield reset pin to a shield ground pin, that will force all the UNO's 328P I/O pins input to high impedance input mode so will have no effect on anything wired to pins 0 and 1 to utilize the USB serial function.
Lefty that is tremendously clever. Thanks so much for that tip. I'll have to remember it the next time I'm reaching for a chip puller 
Geoff