Save your fingers and a lot of frustration and have some other tools on hand if at all possible. Although the ball end allen key is very useful for getting in at awkward angles a 2.5 hexagonal driver is so nice for this build. Digital calipers/Small Engineers square/Wire cutters for cable ties/Small steel rule/Pair of tweezers for picking up small parts like washers etc. Torch for seeing into holes to line up components and clean out foreign objects/small hammer to seat difficult nuts/small round files/sandpaper. Possibly a 3mm tap to clean out holes on frame but I found I did not need it in the end/Socket for the bed nuts, I scratched the y bed holder putting the bearings in with the pliers. Have fun, its a great kit.
Hi Jonathan, thank you for the list of additional tools. We are trying to include only the necessary tools for you to build the printer. However, you can for sure use other tools to help you with the assembly.