JOEE,
First off, congrats on the purchase. Sounds like your EFS is cloned after a Colt Government 1911-A1. My Charles Daly FS is a "70 series" type as I would think yours is too. To my understanding, all parts are interchangable except the grip screws. I don't know if mine are interchangable with Colt screws as I haven't replaced the grips. Charles Daly is supposedly changing the grip screw bushings to match the thread on the Colt frame. Some fourm members have changed the bushings themselves and others have went to the hardware store and found hexhead screws. Probably cheaper than buying the screws from the big name suppliers I would think. There are far more knowledgable members on this forum than I, so I hope they clarify if there are other parts that are not interchangable.
Enjoy your CD and happy shooting,
gf