Spool holder for Leapfrog CreatR

If you own a Leapfrog CreatR this little thing might save your print.
It will insure that the filament spool will stay in place on its rotative platform during the print.

I just ruined a 8h39mn print in the very last minutes because the spool failed from the rotative platform resulting in no more filament feeding the extruder ! (see photo)

And that's because the spool was having just few filament left.
Therefore it was not heavy enough to stay in place by itself .
Something the Leapfrog team should have think of !

Edited : I also uploaded version 1 because I don't have time to print and test V2, and because I'm sure V1 works well. Please tell me if V2 is high enough. I have a doubt here...
Photos are showing V1...

V2 vs V1 should
- use less filament
- be stronger
- take less time to print
- be as efficient (not tested)

Edited October 15th 2013 :
I uploaded a V2 version with a 13mm hole as requested by Rene (see comments) because it seems there is als