I noted that the Voice Knob seems to be critical in the make or break of this pedal!?
Most demo's seem to crank it (Voice) up or it loses note separation.
The Treble seems to be set low?
I was thinking it needs a Larger value Voice pot???
You have used Fly leads to your Potentiometers, Check to see they are going to the the correct Pads.
They could be in reverse?
HLF doesn't list the PT2399 on there website so It could be an Issue, not sure?
Where was the purchase from?
This is based on the Projector 385 from the 50/60's that has a Tube Amplifier in it that can produce Tweedish style Sounds!?
Popular for being modded into an Amp!
I found the BSIAB pedals seem to have that rounded off sound ala lack of highs!
I purchased one way back & promptly returned & swapped it for a more versatile pedal!
I put it down to being a Bridge only type of pedal for soloing, a one trick pony.