Thank you for the help
Unfortunately all my photons are in the field and until the robots return I can't test. I wanted to design a new board before the next competition and I needed every pin I could get.
Thank you ScruffR, I will include RX as well in the pin list and hope I can use it as you recommended. Yes, both DAC and WKP are used. I didn;t want to mess with pinmode-ing A4 since I have 3 SPI devices and I would have to reset the mode after every transaction. I had enough room for a SPI Port expander a SPI TFT and the SPI SD_card pin on the board and I'm out Using RX is a great advantage.
I'll report back after I test the whole thing, thank you again