First test run

First run. It runs very smooth and accelerates really nice. There's a bit of resonance around 3000 RPM when flooring the pedal, which I believe is because the exhaust pipe is too short until the first dampener. On top of that, the dampener is more or less empty...
I'll make a test tonight I think. I'll replace the dampener with a pipe instead, I think that will lower the frequency for the resonance, but it might also raise the average noise. We'll see.

But in general, it runs really really nice! :)