The box is excellent, good quality. Internal PCB slots can interfere with snap connectors and components if not installed on the base or cover. But the box is solid and with fairly thick walls. The props for the screw holes run the full height of the box and it appears they cannot be trimmed. If you do this you will lose the posts holding the cover screws. So you lose about 1/4 inch either way (estimate. I didn't have it with me and didn't measure, I also used a device designed for metricβ¦