From Rod:
I took a piece of Aluminum strap and
bent in a u-shape. I used foam pipe insulation to surround the X brace
above the pax seat. Did not have a vibration issue. The view from the
camera is out both the windshield and a partial out the left side window
while capturing the left half of the instrument panel and the pilot from the
rear. The ty-wrap is just for safety should the mounting bolt come undone.
This view offers a nice perspective of life inside the cockpit while still
offering a limited glimpse outside. The footage works well with other
exterior mounted cameras when editing for a DVD. My ASI, Alt and VSI are
all on the left side of the instrument panel. This is good for performing
test flights when one wishes to document data from those instruments. For
safety sake, I do not use this mount with a passenger in the back seat as
the proximity to their head and the mount is too close. The J5 has a wider
fuselage interior than a J3/PA18. It may be better or worse in a narrower
cockpit.
I am going to see if I have pic of an exterior mount that Ive tried.