Ikea Grundtal Filament mount

I was sick of carrying around my filaments to my 3D printer from the storage, so I made this.
This is designed to hold up 10 rolls of filament (=10kg) with the 80cm Grundtal version of http://www.ikea.com/de/de/catalog/products/00011428/ .
I suppose increasing the infill will also make it more rigid, but I would not recommend to use the 120cm version, because the rods surely will bend over the weight of the filament.