Paul,

 I drove out to the airport this morning and inspected the flex plate on my
 p-port 20B the best I could with everything assembled.   The bad news is
 that it does appear to be cracked in at least one place down near the
 counter-weight area.  The good news is that I found it on the ground.  I
 will be removing the psru today and will report on my findings at that
 time.

 Mark S. in TX
 3 rotor P-port.


 That confirms my suspicion where the cracks are starting. We all owe Dave
 for finding this out.

 Dave do you have any more info on that $200 chrome molley flywheel?

 Paul Lamar

 Paul,

Attached is a picture of the 13B flex plate off my 20B.  I only found one
crack, but it is fairly large.  In the picture, it is U-shaped and directly
above the upper crank bolt hole.  It emanates from one of the lightening
holes.  FWIW, the crack was just barely visible by shining a flashlight down
between the flywheel and rear counterweight.

Mark S. in TX

Mark

Thank Dave!
Right where I expected.

Paul Lamar