I see you set up gears before. I've studied this for the past number of weeks and watched many, many videos on this. I understand setting pinion preload and finding correct contact patterns while maintaining backlash within specs. Tools needed are dial gauge indicator, bearing removal tools, bearing race driver, oz/in torque wrench, large torque wrench.
I'm not saying this sounds easy but it seems as long as you take your time finding a correct pattern while maintain correct backlash seems doable. When you set yours up did you do it yourself? I have never done this but think I could. Any thoughts? Thanks