Micro-tweaks to Nozzle RHD Rev C for Slic3r

thingiverse

This is a tweaked version of the **excellent** [MK3 Nozzle RHD Rev. C](https://www.thingiverse.com/thing:3249344) by [RH_Dreambox](https://www.thingiverse.com/RH_Dreambox) optimized for FDM slicing with PrusaSlicer/Slic3r. If you're using another slicer, and/or are able to print the shroud with another high-resolution technique (eg: SLS/SLA/DLP), you should use the original. The following tweaks are optimized for a 0.15/0.2mm layer height, 0.4mm nozzle. The complete list of changes: * Tweaked the mesh under the outlet vents to force Slic3r to correctly detect all bridging perimeters (which is needed when printing with some materials). * Rectified part of the inner vane to force a straight bridging line, greatly reducing sagging. The tweaks to the internal mesh are sized below the effective print resolution, and designed to improve the slicing only. * Increased the space for the lateral blower notch by 0.2mm. * Increased the spacing on the upper fan intake by 0.1mm. The fit on the original blower supplied by Prusa and two samples by LDO were a bit too tight in these areas. * Minimal extra space for the PINDA probe on the right side. Didn't like the shroud being at close contact with the PINDA on the BMG. The extra space has been carved out of the external perimeter and does not affect the internal structure. * Chamfered two edges around the screw holder. Because we can.