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Slender layer fan for 2.4 About For the Mosquito hotend, this mod shortens the Afterburner tool head by 10mm along Y. It reduces weight at the maximum lever point on the tool head and gives an open duct so you can service the interior in case of a dropped screw or similar. You will switch to a smaller layer fan for weight and size benefits, at the cost of maximum air throughput. For ABS, ASA, Nylon and other low-fan materials this is often sufficient but you may struggle with PLA. There is an option for a prettier 40x10 (the one from 2.2) and a lighter, more utilitarian 50x10 which is better on all counts except cosmetically. BOM A Mosquito hotend 6x m3x3.8 heat set inserts 2x m3x12 2x m3x16 2x m3x20 2x m3x30 A: The neat little layer fan from 2.2 B: This ugly layer fan for lighter weight and more air STLs File Note blower_case.stl blower_lid.stl duct.stl You might need supports. I used supporrt from platform only to keep the inside of the duct clean. hotend_fan_cover.stl You might need supports. I used supports on the duct seal wings to keep them a little nice. v_5010_case.stl For ugly 50x10 style. Replaces blower_case.stl. v_5010_lid.stl For ugly 50x10 style. Replaces blower_lid.stl. Assembly You are replacing the front half of your print head. You'll need to replace the front mosquito mount with the new shroud, so tear it down a bit (leave your clockwork intact, we're not messing with that) Put in the heat set inserts. 2 on top of blower_lid, 2 in the duct and the 2 on the backside of the duct for bolting the hotend case together. (5010 does not have heat set inserts on the