Prusa XL Magnetic Filament sensor remix for print orientation and more common fittings

I remixed this model to allow for the use of what are commonly called PC4 or M10 Bowden tube fittings.  They are superior fittings to the Prusa parts and MUCH cheaper.  You probably have some of them them lying around right now.   I beefed up the sides a little to account for the threads.  

I also made changes to allow the model to be printed in what is (in my opinion) a better orientation so that the filament path is more round.  

Print so that the filament path is perpendicular to the bed.  Also - text down.

I had to enlarge a few holes because I printed with a 0.6 nozzle.  If you print with 0.4 some of the holes my be a little large.

I used a 1/8" by ¼" magnet found here: https://appliedmagnets.com/n52-rare-earth-neodymium-cylinder-magnets-1-8-in-x-1-4-in/

You can also probably use two 3mmx3mm magnets.  Note that the orientation of the magnets matters.  Please refer to the original model for very good assembly instructions.

Be careful threading in the fittings!  Printing with a 0.6 is obviously not ideal for what are very fine threads.  It will want to cross thread very badly.  Be careful and make sure that you are threading it in straight.  It should work fine.

The Prusa XL has a notoriously long and high friction path.  This doesn't fix all of the problems - but it really fixes the biggest one, which is that the original spring and ball mechanism is very scratchy and catches filament easily.  So far, this new magnetic design is working very well.

The fittings are not really “M10”, although surprisingly an M10x1.0 nut will fit (M10x1.0 is not a standard size, but you can find it).  The thread is a BSP pipe thread 1/8-28 which is common in pneumatic systems.