replace I2C with SPI Daisy Chain

[instaibil]

Hi Dave,

at frist awesome project.
and i think i will build it after christmas.

i have an idea for ESP -> Arduino Nano communication.
you get the I2C addresses via DIP Switches.
my idea, the same method as with the ws2812b.
a kind of SPI daisy chain. you connect ESP -> split flap 0 -> split flap 1 ......

problem is, you need to have two SPI Interfaces on the MCU.
so thats not possible with the Nano, but maybe another Board like Nucle-G031.

but with my idea you don´t need the DIP Switches and the Display is not limited to 16 Segments.

so what do you think?
do you see any problems?