I started by looking at Pax's design, then set out to design my own. I chose to have three petals instead of two. I also chose to use a 6-bolt pattern instead of the standard makerbot 4, but I think that's probably overkill :-)
The second part is a clip that attaches to a shelf, so that the spool can be hung from the side. I've been printing from it for a little while now, and it's amazing not to have to worry about filament feeding anymore!!
|Here you can see the clip, it failed mid print, usually it'd be a bit wider, and all the bolts would go into it!!|
|Here's the end of the spool, you can see the 3 petals, and 6 bolts that hold the whole thing together!|