Bottom case integration
So, now I was ready to start mounting pieces inside my empty Model 100 case. Using a trick that belsamber mentioned involving a soldering iron to melt some plastic, I was able to move four of the plastic standoffs that used to hold the original motherboard over to the spots needed to mount the new SBC.
I used black colored epoxy to secure the standoffs as well as mount the battery holder. Then it was just some soldering and shrinking the heat-shrink tubing for the wires, and I would have the bottom of the case completed.
They’re now in position to hold down the PINE A64-LTS board at the appropriate spot on the bottom of the case, allowing things to be accessible from the back of the machine. Also, luckily enough, the RJ45 ethernet port would also be usable by popping out the system-bus cover on the bottom of the machine if I ever needed to do that.
Here you can see the USB ports, the reset & on/off buttons, and the audio jack are accessible from the back of the machine through the opening for the original motherboard’s RS-232 port. The audio jack is conveniently positioned right where the original reset button used to be.