This is nice work here to promote the ToTem with PCB layout information and then all what is left to be needed is buying the book as the "missing keystone"
and I fully grant or vouchsafe that Carl and George or what is the correct word to say that someone likes if some other person - have success etc. with his cool book and work -
BUT:
wouldn't it have been a thousand times better if the ITMD book would have offered an improved and new and copyrightfree from Mineoro etc. version of the PDK or of the Crypton or some other so called
"real working LRL"-schematic incl. do it yourself built manual -
than such an almost useless experimental toy???
What is the gain for an electronic-interested-person if he builts this ToTem thing?
Perhaps I'm wrong and meanwhile it really works somehow for LRL detection or there will be some upgrade to get it working but so far I know all what it really does is detecting metal the usual way and on short distance and the "LRL signal" stuff is some "useless demonstration" like a shareware software which doesn't work full functional.
At least this ToTem should be some experimenting platform where it might be possible with some addons and stuff to get some real long range detection on the start.
Funny parable:
The ToteM is like a car with wheels but no motor.
You can drive if somebody pushes the car from behind but you can't drive for real.
And now tell me what healthy thinking person buys or builts a car that has no motor???
Or in other words: What the heck are you smoking, I (don't?) want the same stuff!