I really like the manual, especially including all the schematics. I admire the transparency in this and, as a synth DIY hobbyist, it inspires me and shows that I am largely on track with my own designs. For example, it shows that the double knot runs on a single sided power supply, which my circuits also do, but I’ve been thinking about moving to a double sided supply. This gives me confidence that I don’t have to! 
It’s also apparent from the block diagrams that the Double Knot incorporates a lot of the ideas from the Lunetta / CMOS branch of synth building. Lorre-Mill also released the uTone as a kit, which is also very Lunetta-esque. Most of my designs are based on CMOS chips, so it gives me the impetus to crack on.
Thanks for posting the manual!