[Fenring]

So the manual for R1200S states recommended tyre pressures to be set to:
front = 2.2 bar (32 psi), rear 2.5 bar (36 psi).
Stock tyres were Metzeler Sportec M1 and that tyre pressure worked fine for me, up until i got a rusty nail in the rear so I had it patched up.

So a few days ago I bought a new set of Metzeler Sportec M3 and I come home check the pressure and it's like 2.9 bar (42 psi) front and rear, so i deflate them to 2.2 front and 2.5 rear.

Today I go to work and the tyres look like they're sagging a bit, so i check the pressure and it's as i left it over the weekend, but it doesn't feel that good on the road. I'm now looking at the Metzeler website and they list the following tyre pressures for M1 and M3:
front = 2.5 bar (36 psi), rear 2.9 bar (42 psi).

Who should I trust then? I'm inclined to inflate the M3s to Metzeler's specs, but I don't have enough experience to decide what's better. Any thoughts?