@dc42
SPI success! Before unwinding everything, I took another look at the git repo and spotted LISAccelerometer.cpp had been updated after my other file update. I updated that file and everything compiles for LIS3D on SPI.
Ill mark this question as solved once I confirm HW function. I have the chip carrier for the SAME5 on order but probably won't rec for a couple weeks. I may just order the PCB regardless as I need the machine back up and running and the accelerometer no critical for its fxn.