Bose Wall Mount (similar to Bose WB-50)

I needed a wallmount for my Virtually Invisible 300 wireless surround speakers and I found a great solution (https://www.thingiverse.com/thing:2262847) - but I needed a little bit more stability and I wanted to be able to mount it on a corner. So I modified the original and additionally designed a corner-mount.

The wall mount should be compatible with:
- Bose Surround Speakers
- Virtually Invisible 300 wireless surround speakers
- Lifestyle 600 home entertainment system
- SoundTouch 520