Hi, Just a quick question. What is the maximum extrusion volume in mm3/sec for E3DV6 and for Volcano? I remember reading somewhere that there is a limit of 8-10 mm3/sec (in general, not just for E3DV6). I know about the calculation (nozzle size * layer height * print speed). I've created a spreadsheet that shows me what are the safe speed for given layer height and nozzle size. So far I have not been able to achieve this level of extrusion (10 mm3/sec). Apart from high speed printing (which my delta is capable of) I run a simple test - given the filament size of 1.75mm, I should be able to push the filament into the air so to speak at the rate of 4.15mm/sec. This I have not been able to achieve. The highest I could go without extruder grinding through the filament was 2.5mm/sec which gives me the extruded volume of 6.01mm3/sec. The calculation for that is - Pi * (filamentSize / 2)^2 * feedRate where Pi = 3.14159 and feedRate is expressed in mm/sec Any thoughts on this?