Witbox extra long spool holder

This replacement spool holder is designed for 2.3kg spools (iso_544) which are ~100mm width. It also have a ridge so a 70mm spool (original bq spools) stay in place and doesn't wiggle around.

This holder will acomodate almost any spool, as long it has a 30mm or bigger hub, wich are the majority, with the exeption of taulman's spools.

V2 Updated!
* tightened mounting clearances, son it stands horizontal (previous version have a singly downwards slope)
* Improved 70mm ridge position, so