Dimensions and cut outs for Fi IB 18s

[rickf325]

I've searched through the threads, and can't seem to find this information anywhere.

I plan on flush mounting Fi IB 18's into a manifold. I am going to start work on the Manifold now, and the drivers haven't even been ordered yet.

I want to flush mount the drivers to the outside of the manifold (as it suggests in the FAQ).

My questions:

1. What is the diameter of the cut out (the full hole).
2. What is the width of the routed edge (in the MDF, to accept the flush mounted driver)?
3. What is the dept of this routed edge (.75" would be easy as it is the thickness of the MDF)?
4. Bonus question: How much (roughly) will the driver stick out of the manifold. I am just trying to figure out if I can prebuild it or whether the driver mounting has to happen from inside the attic.

Thanks in advance!

[ThomasW]

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