When you work with machines long enough, you soon discover a number of indispensable tools. The two most common being duct tape and WD-40.
I also have a great deal of respect for the humble vice-grips (see them hiding there in the background) - they can be a clamp, a hammer, a knob, a forming jig, and even a set of pliers. Best tool ever.

This artwork was drawn for me by Toraneko. You can find the original upload on her Fur Affinity account here.