Paul
  I was looking at a rotor housing the other day and trying to imagine a
nice P-Port hole in it... It looked to me that the P-Port hole would
interfere with a Tension Bolt.  Is that just my imagination, due they
miss each other?

Mike C.

It looks like a bolt should go there but there is no bolt:) Weird!
As you can see the tension bolt hole in the rotor housing is blocked.
In fact it is on only one side of the rotor housing. Probably an error
in the mold.

 The position of the bolts and the bolt spacing is designed on
the basis of internal pressure. High pressure closer bolts.
Low pressure (intake side) the bolts are further apart.

Paul Lamar