Atomic Filament Spool Extension

I wanted to use a 3.5kg spool of filament from Atomic Filament in my EIBOS filament dryer box but the spools from Atomic are tall, not wide. This cylinder allows each half of an Atomic Filament spool to snap onto it, extending the spool 100mm. Perimeters matter more than infill here. Minimal bridging so no supports needed. Depending on strength of the material you may want more solid top / bottom layers. The portion the spool clips to is 4mm thick in case you want to just make that whole section solid top / bottom.