I've reached the part of my build that I was dreading the most - figuring out how to square up all the axis and making sure the spindle is positioned properly in relation to the table and the axis.

Please can someone tell me what tools or measuring devices you guys use for this? For example, should I buy this:

https://www.ebay.com/itm/Pro-Tram-Br...EAAOxyVLNS6tfr