New DIY sprayer build

Looking to build a sprayer on the back of my 15ft drill. Currently running a v2 pcb and panda box but want to add a controller. (Will upgrade to AIO someday but not now.

Simple setup 15 ft foot spray bar, 1 section. 9 nozzles.

Not sure which RC board to go with. Building the rest of the system around it.

Thinking pto mounted product pump with pressure return to product tank.

Aiming to compensate for speed only. No section control or variable rate.

Was considering red ball flow indicators for plugged sections, but curious if there was a way to add a graphical nozzle monitor as well?