If you need the tone pot all the way up I would suggest it would be worth going over for an incorrect resistor or cap value first.
I realize everything is subjective but I would not release a circuit without testing it fully, including the tone control and I did not find it “dark” or feel a need to turn the potentiometer up fully to make it merely adequate.
Feel free to post it here so we can have a look before modding it.
Otherwise, focus here and make sure R values are actually R values and not K values by accident, and let us know if you made any substitutions including the pot taper.
