I did just one attempt to mod the volume. I didn't consider the resistor on the board, because (holy crap!) they are correct.
I insert a flying resistor between the lug 3 of the VOlume and the wire. A 47k. And it seems work fine!

The volume is lower and I can't hear eny difference in the sound (Should I?). I'll calibrate a bit the amount of the resistence, but finally it should fix this weird issue.
Thanks to all, and thanks again for the trick, marshmellow!
Now, I have to handle the Scoop Pot mod, because following the Aeons schematic I had some problem, instead if I move the 220nF cap close to the 47nF (or where the 100nF original caps were) I can get the expected result.
I just change my mind about the charge pump. I misunderstood this detail, I thought the original has it, but probably not.
What benefit should the charge pump give to it? I think more dynamic and definition? But I think also less gain, even if the Tight metal has tons of it.
If I don't find any reason good enough for my taste probably I'll make the charge pump for another pedal.