Manual Build Plate Alignment Guide

This is a little tool to help with aligning your build plate. There are simpler guides that require sticking to the underside of the plate, and others that can be attached to the bed supports but are then subject to high temperatures that can damage them. This is a simpler alternative that isn't quite as nice (you need to hold it firmly with one hand, and it only provides one corner to align against) but with a bit of practice it works well enough.