I came up with this design to create a stable filament holder that could hold a full 1kg spool on top of the M3D Micro printer, rather than behind. Print 4 legs (they only just fit on the M3D and need to be positioned diagonally across the print bed!) and one of everything else - the legs friction fit into the centre, and the weight of the spool keeps everything nicely in place without any gluing! Obviously you'll need to use a high level of infill as there'll be a fair bit of weight on these parts. This stand can be used in two ways - either with the rotor plate assembled with 4 skateboard bearings (size 608), or without the rotor as a non-rotational stand. In the non-rotational configuration, feed the filament from the spool through the hole in the centre and into the print head. The filament will then pull from the spool without the spool needing to rotate - I've had limited success with this so far, and prefer the rotation mode personally In the rotating mode, place an old CD/DVD (that you don't care about the data on) on top of the rollers to provide a smooth platform for the spool to rotate on. It's also recommended to use a couple of the filament guides to keep the filament feeding along the line of the cable - see http://www.thingiverse.com/thing:746048 for a suitable part. All the parts are sized to be printable on the M3D Micro, although the legs needs to be printed along the diagonal axis of the printer. There's a few more parts to come for this, including a centring hub and extension shaft to help keep the rotating spool centered and balanced - I'm testing these parts now before I release them! Update - new version of the leg which now hopefully lies flat on the print bed. Update - 14-Sep-15 - Spool centering cone is now here - this can be inserted into the top of a spool to centre it on the shaft - for tall spools an extension piece to increase the height of the centre tube Update 17-Sep-15 - I've added a couple of extra photographs to show how this is assembled, with the rotor plate sat on top and the bearings hanging over the side. Then the DVD you don't care about should be placed on-top to provide a stable turntable for your filament.Update 3-Nov-15 - I've added a new design for the filament support arm - which now has two holes - I've found the feeding works better if the takeoff from the spool goes through the top hole in one arm, and the larger slot in the next arm before heading into the print head.Also, loose filament can be handled by using 4 support arms as a cradle, then feeding the filament through the centre hole of the tower (see new photo)