Hi Shane,

Did you get this working in the end?

As it happens I'm using the same two chips, and have had the same thought!
I searched for "sharing crystals between IC", but I could take a guess where "sharing crystal" might get you

I was talking to a friend and they recommended I use a series resistor, and tune it up to minimise reflections off the IC1-X2(out) and IC2-X1(IN) as well.

Cheers,