Albert, I'm delighted to finally find this post and see pics of your Mk 3 project. It is even more beautiful than I expected.
In addition I would like to thank you for providing so many great details of your designs/construction and your willingness to share so much of what you have learned with others. I found a Mk 2 shortly before you began posting on your Mk 2 and it seemed there was not much information on quality DD plinths and set ups at that point. There was quite a bit on rim drive projects but I was skeptical that all those concepts would apply to DD.
Anyway, many of us owe you a big thanks.