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Thank you, that helps. As far as I can tell, the design the way it is should work, although the way the current base design is built, the CR10S Pro nozzle is a couple of millimetres closer to the back plate than the CR10 and Ender 3, but I designed room into it for that case. As you have probably noticed, a feature of the new nozzle design is a fairly aggressive angle of the end of the nozzle, this was to eliminate a problem with the original duct where the two air streams would basically cancel each other out and leave a stagnant pool of air around the nozzle. I am attaching my design screen-shot, which show the duct on a CR10S Pro. There is a grey shadow of the Ender 3 nozzle position, but you will see the lines representing the centre line of the nozzles, projecting to meet almost directly below the nozzle. I believe the next version of the base will re-position this so it aligns more closely across different machines.