WOLFTEK QC15 headphone shells (for Bose QuietComfort 15)

UPDATE 10.11.2017:

I improved the shells so that they should fit a bit better now. The knob hole is situated more acurate and the inner screw holes have been reinforced.

ORIGINAL SUMMARY:

I never liked the standart QC15 Shells. They make the headphones look so old fashioned. I searched for some custom shells on many 3D platforms but couldn't find any so I made these myself. They fit ... but they don't fit perfectly. This is my first 3D design. Never used CAD before so excuse any big m