Mudbunny v2012 Creamy Dreamer sounds overloaded / farted out on some notes

[Loztboy]

I built the Mudbunny v2012 to Creamy Dreamer spec, no subs exept: R22 2K2, C6 47n, C10 3n9, all pots are 100KB.
When I play and strum hard the sound is muffeled, overloaded, unclear, especially on frets higher than 5 on low E.
I don't know exactly how to describe it, but non of my other muffs does this.
I use Fairchild 2n5088 transistors and have tested with others NOS 549B with same result.
The Transistor voltage with supply voltage of 9,3V is:
Q1
E 0V
B 0,57V
C 4,09V

Q2
E 0V
B 0,57V
C 4,08V

Q3
E 0V
B 0,56V
C 4,02V

Q4
E 0,67
B 1,25
C 4,96

Does anyone know what's wrong, or is it supposed to be like this?

here is a photo of the guts:


I did use the search, but I could not find the same exact problem.

[Loztboy]

I changed R23 from 390R to 2K7 now and it sounds much better, and it's not crapping out anymore.
Not sure if I should put a 10K in R22 instead of 2K2.
Collector on q4 is now at about 8volt.