Witbox external spool support for flexible filament

The witbox printer works fine with flexible filament, however you have to put the filament directly inside the extruder instead of using the charging teflon tube.
That's why this spool support is required.
my version is inspired by the one create by http://sicnova3d.com/ for filaflex little spool, I need a bigger one for any spool.
This version can accept several spools, you can scale the axle in Y direction if you want to be able to add more spools :)