two for one.

Has anyone set up both router and 3D printing capabilities right from the beginning? What do I need to do differently with regards to wiring?

A lot of people have their mpcnc’s set up for multiple capabilities.

To add 3d printing, you will need an extra driver (and if printing pla, a fan as well), remove the T0 resistor and put a Thermistor there, and will also need to add jump wire at the green power plug on the ramps board.

instructions for adding more power can be found at https://www.v1engineering.com/assembly/ramps-wiring/