"Now we've argued this before and it's my personal preference to stray outside of the industry standard on O.H. testing and I acknowledge that there are many who disagree with me on this, which is ok."

I decided to test with the industry standard (2 x 4) after hearing the arguments on this forum, because it seems like a seller would have much more ammunition should the opener malfunction during a non-industry standard test like you are suggesting.

I actually built a force sensor with a load cell and a digital display so as to measure the force applied when the garage door touches a 2 x 4. Nice gadget but since there is no standard as to the amount of force which may be applied and still autoreverse I was back to just using a 2 x 4. Bye the way, I had doors test at over 300# and still autoreverse.

David