I own the 747 by SSG and really hated it at version 1.0 BUT their latest 1.3 update has improved the plane a lot and more updates are coming.  I actually abandoned all my XP10 Payware to fly the SSG 747.  The FMC works for me.

Good to read that the B748 works for you. It just didn't work for me, it didn't meet my expectations.

At least I got the Bell now, what a beautiful addon! ;-)