Less tight bars available! Depending what you need, default bars are tight to have a strong hold. If it's too tight for your printer, use the "less tight" versions. This is for the width of the bars (not the size of the notch) Even more simple to print ! With square bases, the bars are impossible to miss ! Even more simple than my Simple Filament Spool Stand V2 (http://www.thingiverse.com/thing:281848). No additional parts needed, you just print 2 sides + 1 bar, you clip them and you're done !! No bearings, No screws, No washers !! Just print and clip ! This version works with Standard Spools of 1Kg of 1.75mm filament and Printrbot spools. [update:]The stand is 10 cm tall. So it's very easy to scale up (110% will give you 11cm tall, 120% > 12cm and so on). [update 04/25/14:] Following people's requests, i added 2 new length bars : 130 mm long an 150 mm long: Just print with 2 perimeters / 30% infill :