3030 Angle Bracket - Ultimate

I downloaded and printed the most commonly used 3030 Angle from Thingiverse but I was not happy with it. A few issues really frustrated me.

1. The 2 x Right angle sections were too thick and the screw could not pickup the nut when the nut was in the bottom of the channel.

2. The 2 x 45 degree braces were quite thin and have been increased in width to 5mm to provide extra strength.

3. There was a recess behind the screw holes which significantly compromised the strength of the item a