Update on the posi drive. I doubted the screws were pois drive because a #4 Phillips fits the hole perfectly. Before opening my piehole, I always try to do some homework even if I know I'm correct because we can get in trouble when we think.

I have asked around about the posi drive and have ran into a couple of people who are familiar with the fasteners. One person is the elevator mechanic who has been working on the elevators my building. He knew what a posi drive was and what they looked like.

Another person is a coworker who works at our UK location and happened to be in the US this week. It seems that a pois drive is a dominant fastener in the UK. He explained what one looks like, and sent me this link

http://www.wissen-elektrowerkzeuge.de/mdb/data/en/lexika/eopt/pozidriv_application_to.html

To make sure, I showed both people an origional screw and one of the replacments. They both instanlty said that these were simply #4 Phillips fasteners not posi drives. (Soemone eles who says that these aren't pois drives are #4 phillips head drivers.)

In a debate is the one who makes the postive statement is obligated to substanciate the claim. In other words, it has to be proven to be a posi drive fastener--something that has yet to have been done--not someone proving it isn't a posi drive fastener.

I have never seen a fastener that is even remotly close looking to the description of a posi drive. Since everyone is so gungho on the posi drive, why not post a picture of a #4 phillips head for comparison.