Hi All, I'm getting stringing, occasional squeaking from the titan, and what I think are skipped steps. I've had issues with PLA, ABS, and a TPU. My retraction is 2mm (think that's max for the V6 isn't it?) and pressure advance is set up on the Duet v0.6 as follows: M572 D0 S0.1 I've a long bowden tube on this system. I'm running the standard Motech MT-1701HSM140AE at 1300mA and it's hot to touch. On the quicker print speeds I can hear a 'wup' sound and it seems like the pressure in the bowden has reversed the stepper. I don't think this is retraction as it often happens in solid infill. Am i simply trying to print too fast? Need a bigger stepper? I'm finding the titan a little fussy on mounting to get it running smoothly and it often squeaks loudly mid print on occasion. Advise welcome. I'm plodding on trying different extrusion temps as I'm not sure how accurate my hot end temp reading is. How do you calibrate this or is it simply trial and error? IR sensors don't tend to read accurate from small shiny metal targets.