I have had the packages from E3D arrive, sit unopened, and relocated with me while I moved country twice. Finally I have the time to build it. I'm a bit overwhelmed by the material online. So, given the amount of collective wisdom that much have emerged, I want to ask for suggestions about how I should do the assembly -- are there any upgrades or modifications that are worth adding for the initial build? What requires extra care to prevent problems down the line?