Baz - thanks for this video.
I am sure this will help folks to understand what the Gotoh UPT's are all about.
One point to add is that other than the different color and button shape options, these also come in two different lengths for the post, in order to accommodate thinner or thicker headstocks, thinner being the UPT designation, and for the thicker being the UPT
-L designation.
Also, other than those Grover Champion pegs (which extend about 22mm behind the headstock) that you have on the Rob Collins comparison uke in the demo, the Gotoh UPT shaft will likely stick out behind the headstock a little bit longer than most other friction tuners. When I replaced the stock friction tuners on my Martin OXK with the Gotoh UPT-L (the short ones would NOT be long enough to fit the thickness of the headstock wood), they extended far enough that the OXK soprano would NOT be able to lay flat on it's back any more, and also necessitated using a different case, and one with enough depth in the headstock area such that the tuners were not pressing on the floor of the case, and thus putting dangerous pressure on the scarf joint.
The $30 "Luna Ukes" brand Soprano case sold on Musicians Friend/Guitar Center (USA) works great for solving this issue, and to make the neck parallel across the neck support I put a fitted 25mm thick piece of foam under the back of the body to get it level, and now it's all good and fits like a glove.
Other soprano ukes might have a thicker body depth than the Martin OXK, as will larger ukes so this may not be an issue. These Gotoh UPT tuners are ALSO shorter out the back of the headstock than PegHeds planetary tuners, which the end of the tuner buttons are almost 28mm beyond the wood on the back of the headstock.
Hopefully this info will be useful to others who might be considering the Gotoh UPT tuners.
I love them on the ukes where I have them installed.