OpenPlotter - PyPilot - TinyPilot

[DoubleDutch]

Some very basic questions:

• I have an RPI-4 with OpenPlotter
  
• I have attached an MPU9255, the PyPilot recognizes it and and I can calibrate my setup
  

The questions are about TinyPilot:

1. In the above setup - do I still need TP?
   
2. If so - does TP need to run on a separate RPI or can it run on the same RPI running OpenPlotter (or is that just a bad idea)
   
3. If it's OK to run TP on the Open Plotter RPi: is TP installed as part of OpenPlotter and if so.... where is it..... and how do I start it?
   
4. I found various diagrams for running TP on a RP-1-W but if it can all run on one RPi are there wiring diagram of how to connect an OpenPlotter RPI to a motor controller / which pins should be used?
   

Thanks in advance.