Thank you. Copy away. I do not know why this 'hexapod' or Stewart Platform truss collimation method hasn't been widely adopted as the standard; it truly simplifies everything to do with mirror support and has no downsides. I can only imagine people have difficulty conceptualizing the motions involved and give up, thinking it too complex. It isn't.
Although in a sense I 'invented' the arrangement in my head late one sleepless night, the design was so elegant and held so much promise I couldn't believe I was first to do so. And I wasn't. I soon found it was called a Stewart Platform and a search on that term with 'telescope' led me to Cloudy Nights where the concept was debated at length back in 2008 essentially in disbelief that it could work. Luckily I hadn't read the thread before convincing myself it would work or else I may not have built it. As it is, the concept works brilliantly and exceeded all my expectations.
The implications for mirror support are huge. Because the Hexapod has 6 degrees of freedom there is zero need for any other alignment or adjustment mechanisms in the mirror support system. None at all. Zilch. Everything can be fixed firm and built solidly without risk of slop or flexure from any adjustment mechanism.
Oberon, some of us have used the Stewart Platform principle in the past, without knowing it was called that (at least for me) until now. They are sometimes used on ball scopes. Here is part of what I wrote last year about my 20 inch ball scope in CN:
Because of the steep angle on the telescopes hemispherical tube's reinforcing ring, I couldn't use ball and sockets like those sold by Moonlite (not enough available angle). So I drilled the balls and added a 3 inch long, 5/16 inch diameter stainless steel threaded rod, which threads in the end cap of the truss tube. This provides plus or minus 1 inch of additional adjustment, which is very handy in aligning the UTA with the mirror and adjusting focuser position.
And here is the picture of the bottom part of my truss tube attachements (looks familiar?):
Not realizing when I designed it that I could have used that to collimate, I also designed a separate collimation system for both the primary and diagonal. However I did discover the Stewart Platform principle when I was putting the scope together and had to center the UTA with the bottom, it came in very handy. Also, adjusting the truss lengths was easier, as you mentionned already. Another scope that used the Stewart Platform principle to collimate the optics, if I remember correctly, was Mike Linnolt's 20 inch ball scope. Like you, Mike exclusively used the variation of the trusses to collimate (for some reason that scope was sadly "decommissionned" and the Mirror recently sold here on CN).
A question on your scope: how much does it weigh. I think 16 inch f/4.5 is the sweet spot for the ideal portable amateur telescope and yours is one of the finest examples I've ever seen. However I'm always interested in the operating weight of the telescope (including eyepiece, finder, batteries, etc.). Could you provide a breakdown of the components and the final weight of the instrument?
Again, congratulations on a fine piece of machinery!