Toolhead Assembly - Request for Advice

I was hoping to assemble the Aerostruder toolhead for use with my organization’s LulzBot Mini. I want to assemble as much of it as possible, including 3D printing or CNC routing any possible parts. I’ve never assembled a toolhead before, do you guys happen to have any tips for making the process run smoothly? Thanks in advance!
I’ve linked the OHAI instructions here for reference.