I have the same weapon. I find that it is much easier to remove the slide w/the FLGR still in place. This includes the spring and bushing as well. Basically I strip it like any other autopistol to get the slide off the frame, then finish stripping the slide/barrel/guide rod like any other 1911.
I'm sure that some 1911 lover will be along shortly to tell me that every time I fire a 1911 with a FLGR it's like kicking the ghost of JM Browning's dog, and that stripping it like that is akin to communism, but it works for me.
Good luck!