Actually I first now found out about the SA-5 and did see the TechMind video, where he show (and saluted) the contend of the printed manual, which is my manual ripped for any reference to TinySA Ultra and the persons involved beyond me.
I left a comment about not being asked for using the content and page designs.
Anyway, nothing to do about it and it is not first time such behavior is demonstrated.
It's very generous of you, but I still think it's unfair to use your work without attribution. I have already expressed my disapproval on at least one Youtube channel describing the SA-5 product.
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The fact that the SA-5 is a shameless knockoff of TinySA, and probably (my guess) unsupported to boot, makes it an unviable proposition. I wouldn't want one if they gave it to me, even though the rotary knob does seem like a better solution.
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I summary, open source is good, actually very good, while the practice referred to here is despicable.
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PS: Rant over. Your work is excellent and I always keep a printout on hand when using my two TinySA Ultra's.