So, what are the determining factors for the proper action height measurement? Is it strictly personal preference? or is it fret height? or what? The KLOS is one of the few ukes that I can barre anywhere and play as loud as possible without any rattles or unwanted vibrations.
This is a very good answer. To get a very low action everything has to be near perfect. Frets need to be leveled, crowned and polished. Neck needs to be straight with no warping or skewing, a tiny bit of relief is good. Most ukes from HMS with a full set up come in at an action height of 2.5 - 2.65 mm. I have a few customs that are 2.25mm, play like a dream and you can strum them as hard as you want with no buzzing.
Cyber3d.....hold on to that Klos, if it plays like that it is a real keeper.