SummaryThis is an alternate version of filament spool holder without the intricate inside cutout design for easier printing. This version also includes a lock keys to keep it secure to rails. Original version: http://www.thingiverse.com/thing:1342770 Spool holder for top rail of Lulzbot Taz 4 or 5 or any printer with a 20mm rail. No screws or bolts required. I have included a files for spool rod but a 1/2" pvc cut to 156.5 mm works also. File Descriptions: SimpleSet_with_Rod: full set of Simple version with a spool rod SimpleSet_without_Rod: full set of Simple version without spool rod SideA_solid: single piece Simple version ( Side A ) SideB_solid: single piece Simple version ( Side B ) SideA_key_V2 : single piece version 2 ( Side A lock key ) SideB_key_V2 : single piece version 2 ( Side B lock key 'same as side A' ) rod : single piece ( spool rod )Print SettingsPrinter Brand: LulzBotPrinter: TAZ 5Rafts: NoSupports: YesResolution: .2Infill: 15 percentPost-Printing