Here is an alternative backplate that takes 4 slots and accepts Ozymandias, Mercury, and Penelope:
This data is also below:
Measured Pandora/Installed Board Dimensions:
| Harting connector diagram dimension center to top of board: | 3.85 mm or 0.152 inches specified |
| Measured centerline to top of board: | 0.147 to 0.1545 inches |
| Height of D Connectors | 0.50 inches measured 0.494 inches specified |
| Height of Ethernet connector on Ozy | 0.43 inches measured 0.406 inches specified |
| Height of BNC connector holes | 0.45 inches measured 0.434 inches specified |
| Height of Audio connectors on Mercury and Penelope | 0.50 inches measured 0.484 specified |
| Height of 10 pin header connector on Mercury | 0.35 inches measured 0.340 specified |
| Height of 4 pin header connector on Mercury | 0.27 inches measured 0.250 specified |
| Width of 4-40 screw head | 0.21 inches measured |
| Width of 4-40 screw shaft | 0.112 inches specified |
| Distance between adjacent board centerlines | 0.800 inches measured and specified |
| Distance between top and bottom backplate mounting holes | 4.875 inches measured |
| Length of 2 D connectors on Ozy | 3.3185 inches measured |
| Distance from bottom of backplate to lower edge of D connector on Ozy | 0.750 to 0.806 inches measured |
| Length of 2 D connectors plus Ethernet connector on Ozy | 3.833 inches measured |
| Length of D connector on Penelope | 2.095 inches measured 2.088 inches specified |
| Length of audio connector on Penelope | 0.323 measured and specified |
| Space between D connector and audio connector on Penelope | 0.295 inches measured |
| Length of D connector plus audio connector on Penelope | 2.7095 inches measured |
| Distance from bottom of backplate to lower edge of D connector on Penelope | 0.778 to 0.834 inches measured |
| Distance from bottom of backplate to lower edge of Audio connector on Penelope | 3.219 inches measured |
| Distance from bottom of backplate to upper edge of Audio connector on Penelope | 3.586 inches measured |
| Length of 2 audio connectors on Mercury | 0.694 inches measured |
| Length of 10 pin header connector on Mercury | 1.268 inches measured 1.265 inches specified |
| Length of 4 pin header on Mercury | 0.400 inches specified |
| Length of BNC connector on Mercury | 0.3815 inches measured 0.380 inches specified |
| Length of audio connectors plus 2 headers plus BNC on Mercury | 3.1625 inches measured |
| Distance from bottom of backplate to lower edge of audio connector on Mercury | 1.468 to 1.5135 inches measured |
| Distance from bottom of backplate to upper edge of audio connector on Mercury | 2.22 inches measured |
| Distance from bottom of backplate to lower edge of 10 pin header on Mercury | 2.3125 inches measured |
| Distance from bottom of backplate to upper edge of 10 pin header on Mercury | 3.5625 inches measured |
| Distance from bottom of backplate to lower edge of 4 pin header on Mercury | 3.625 inches measured |
| Distance from bottom of backplate to upper edge of 4 pin header on Mercury | 4.0625 inches measured |
| Distance from bottom of backplate to lower edge of BNC on Mercury | 4.28125 inches measured |
| Distance from bottom of backplate to upper edge of BNC on Mercury | 4.6875 inches measured |