TH-074/075 Holder

This is a remix of the TH-D74/75 holder done in Fusion360. My compliments to Derek Mullen for coming up the base design. Many thanks to Larry McDavid who drove the dimensional and functional changes made to the original design.

This version of the holder has several added features:

1. With the intention of mounting the HT beside a car center console for mobile use, it was important the optional Speaker/Microphone and dc power cables be connected before the HT is inserted into the holder. The HT can be lifted out of the holder without removing the connectors. This forces the right-side slot to be open at its top.

2. The open side slot requires a sturdier holder; the thicker walls and added bar across the front allow that open side slot and provide superior protection the HT when mounted in a car.

3. This design with the spacer plate allows the belt clip to be installed on the HT while the rear of the spacer plate is mounted against a flat surface, giving finger access to release the