Tweed 59 Tone pot impacting volume

[allsmoke]

Howdy all,
I just finished up the Tweed 59. When engaged there's a bit of a volume drop, UNLESS I turn the tone all the way to the left. Then, it really cuts the high frequencies, but also boosts the volume. I reflowed everything. I have no bridge joints and I'm at a loss as to why this would be happening.
I also checked the bias on the 3 transistors on the drain leg.
Q1 is measuring 4.7
Q2 is measuring 4.9
Q3 is measuring 3.9

So given that, is there anything that would cause the tone pot to have such a big effect on the volume?
I'll upload pictures from my phone once this posts (posting from computer for ease of typing)

 

[allsmoke]

 

[Laundryroom David]

tone and volume are interactive on the original amp IIRC. May be true to that.

 

[allsmoke]

tone and volume are interactive on the original amp IIRC. May be true to that.

Yeah, I thought of that, but the sound just gets so heavy when I roll back the tone (which increases the volume) that I think there has to be something up with the circuit (likely my error), but I just can't pin it down.

 

[Sturdag Lagernathy]

Reflow C8 and R15. Thats the treble side of the tone control. Looking at the schematic, an open in that area would cause your problem.