Dell T420 5.25" Bay Drive Bracket v0.1.2

A fully usable version of the model with correct tolerances. The model was test printed and test fitted multiple times to ensure the right fit.

Fixes

• Reduced spacing between drive mounting walls by 1mm.
• Decreased bracket width by 1mm (v0.1.1 is technically a perfect fit but it is quite tricky to get the bracket installed / removed from the bay)