RE: Add hook to end of `custom-create-buffer-internal'

[Drew Adams]

        I'm not sure what you mean. What is "special-display"? Are
        you thinking of a
        special-display buffer somehow? Remember that a
        *Customize...* buffer might
        or might not be a special-display buffer.

    That's under your control.  If you set special-display-regexps
    appropriately, they are all special-display buffers.

Sorry, I'm not following you. What is the relation to the original
question - the general need to be able to do something after the buffer has
been filled?

Again, if you can move the call to the existing hook to after the buffer has
been filled, as you suggested, that would solve the pb.