I added platenuts to the flanges of the ignition module for easier removal in the event that service is required. I'm probably also going to change out the screws on the serial connectors with the kind that allow hand twisting.
It's a great location with one small caveat: due to my lack of foresight I located the boxes on the top side of those angles, making it difficult to work on them or remove them once the top skin was in place. I'd use the location again, but I'd turn the aft angle around and mount the boxes on the bottom side so I could just unscrew them and drop them down.