It would be awesome if the door cards were able to be used. They're using Kaba LLCO cards. Talked with a technician there and he asked if our readers where compatabile to the MIFARE cards so the door cards might work. I have a followup meeting setup for Thursday with the GM. I'll get a card from him so we can do a trial run, before offering the complete solution. Thanks for your input. Sounds like I got some homework to do.