I have experience building a decent sounding exhuast for an engine with a really nasty,
and REALLY LOUD crackle, the way to cut the shrill part and get more bass was to have
an early tight, small chamber, and a final largest possible chamber, and turning it
at the end made a big difference.
.038%er (means I know there's only .038 % CO2 in air)
Some days you feel like TORQUE!
Some days you feel like HORSEPOWER!
Once you establish yourself as an eccentric,
you rarely have to explain your actions.
Something a guy at a HD parts counter told me 30 years ago,
"You know what I'd do with that bike if it was mine? RIDE IT! Nothin' else ."