Adventurer 3 series, Finder, Dreamer series can print 1kg filament spool as long as place the filament outer from the printer by using a filament spool holder or a filament dryer box. Send the email to service01@flashforge.com to get the spool holder sliced file!
Filament Dryer Box
Filament Spool Holder
For Flashforge Transparent PLA Standard Filament spec, please refer to this page.