A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Randall Morrow
Date: 2017 Oct 5, 12:28 -0700
There are numerous posts on this but I level the mirror with 2 precision levels. The vials were purchased and the bases were home made from square steel tubes with brass feet soldered on. Easy work with a Dremel tool. Search under my name for details.