prusa spool holder -strong version.

I create this version of holder after broke old one. it's arms was too long and corner was weak. I used some arched support connections. Arm lenght and height are good fitting for feeding filament without any filament guide. it is working quite good with http://www.thingiverse.com/thing:86463 3 in 1 spool shaft.
Enjoy..

Update: I corrected some curves. and opened top hole for easier operation. Happy printings..