Hi Mike:
I got a Graber Cellular Shade to try out in my office. It pairs as Device, not identifying with the Generic Z-Wave Shade. Once I switched the driver over, it seems to be working well. Here is the pairing data:
The two-button remote that came with it identified (correctly, I believe) as a Somfy 2 Button Controller. Here is the pairing data for that:
Take care!
Eric