Just wondering, with a slot port running down the middle and then branching off left and right at the back, does the width stay the same or is it 1/2 the width? I've always done 1/2 the width and now I'm not sure.
So in my sketch-up the port shrinks to 3 1/8" at the back, or does it stay 6 1/4 on both sides:
fwiw I posted this on ssa forums and was told it's supposed to be 6 1/4 on each side. And on SMD and was told 3 1/8 was right