Hi! I see that you have all damping settings according to Matris manuals for F15 and M40D. Have you tested other setting yet?
And what are your sag number, front and rear?
You are much lighter than me (160 vs 190 lbs) and you have dialed pretty much preload (I have zero preload on the same springs)
TweeZ4,
Best I can measure gives me about 32 mm front sag and 20 mm rear sag (both laden). Still playing with the damping settings - I'll post more when I decide where I'm going to leave them.