Weird wavy lines, tried reducing SCV and acceleration.

Printed on Sovol SV06 Plus, frog head printed facing front of printer. Mostly seen on the belly which is a slight overhang but slightly visible on sides.

Have tried resetting kipper config back to Bassamanator config. Have redone input shaping, tried lowering corner velocity, acceleration, print speeds but not yet found the cause.

Checked belts are tight and everything is moving freely.

It’s a lot worse when printing thinner extrusion widths to get a smoother finish (0.3mm width on perimeters and 1.2mm layer height) Any thoughts?

Thanks!