There are two versions. V2 has a flair on the roller to prevent spool from rubbing on sides.
The author remixed this model.
Redesigned the roller and updated base so sides slide/latch in without screws. Also made it wider to support 5kg spool. Kept in the screw holes if people want to secure it better but I haven't needed to add in the screws in yet and have been using this for over a year.