Side Spool Mount E3 Pro

Remixed from BoothyBoothy's version ( https://www.thingiverse.com/thing:3757724 ). Removed the upper support arm to make it ambidexterous, bolt holes and nut slots for the metal support also amidexterous. Added some openings in the cross support of the base, originally intended to reduce filament but it works out as a perfect spot to keep the Fila-clips (I use Bassna's - https://www.thingiverse.com/thing:630789 ) and maybe a tool or two.
Loved the length this gives to clear the gantry and keep the height over the table, but the upper support rubbed on my spools with the roller mod I was using. It was a minor inconvienence trying to get the nut to sit still in the bottom while installing the metal arm, so I set it to capture a 5mm nut instead. Still mounts to the side leg with T-nut/bolt combo. This SHOULD work with the standard Ender 3 and similar printers, but I can only confirm it works with the E3 pro.