True variable width spool Holder

This is an adjustable width spool holder.
It is meant to mount on the bottom of a solid plate.

http://youtu.be/8fSdvyERoJE

I'm sure if the inner parts are needed for stability.

Most spools should fit, I changed the design a little bit I hope the taulman spools fit now, but no promises.

Some additional parts needed:
4x LM8UU linear guides
2x 8 mm steel routs
4x DIN 7991 Screws M8x25
4x DIN 934 M8 nuts
8x washer 8,4x30 mm
4x bearing 8x22x7mm (DIN 625)
2x DIN 934 M4 nuts
2x DIN 912 M4x10mm screws
11x Screws 3-4 mm of your choice to mount the holder on the plate.

For more information about the printer visit my build blog:
http://chaozlabs.blogspot.de/2014/05/building-my-delta-printer.html