Thanks, I do use Linear Advance with Marlin machines and Pressure Advance with RRF usually, but with current S3D profile I'm using a setting in S3D called 'Wipe while retracting' (or something) that kinda emulates the LA/PA functionality. I've noticed that having this on messes with the LA/PA so for now I'll go without.

I've gotten the bigger blobs better, there was a small bug in filaswitch code that I fixed. Also tuned the purge tower retraction and as the purge tower is printed with ~200% extrusion, I added some wipe movements to even out the pressure. For the smaller blobs I changed S3D to do the seam on corner so that should hide most of them. Will post pictures later.