Rear ventilation

First step, use the router to get a bit of diagonal on the edge so it will fit with the rear panel above the door. Next, measure up and draw around the vents. I like to draw around the actual object that is going in as it saves measurement errors (it saved me a headache for the speaker panel).

I took the location of the vents from a picture I found on the Web of the back of an actual Defender cabinet. It's great that there's so much information out there about this particular model.



Finally, drill pilot holes for an easy life, fit one of the vents, take a photo and then realise I need to paint it, so take it out again!

Finally, drill the holes in the cabinet walls and, with a bit of balance and skill, tack the panel into position. A few pilot holes and countersinks later, we're all done.