Agree re the drag that can be created if even a bit hangs over the edge.
I find the most likely to create that, is what is between me and the needle.
You mentioned that the teflon was on the bed of the machine.
Is your machine set into a table? or are you working with an extension table?, and thus a smaller surface area, and the quilt hanging off it. That would create drag. Some have found creative ways to build up the area around the extension table to create a more surface. Or have found low-cost ways to set their machine into a table.
If you're wanting to get more "slip" on your surface, spray it with a silicone spray.
Just be careful that you do not have overspray onto the floor, or you will discover how slippery it really is!
Good Luck! .... and as oft is said, practice practice practice ... and you will soon feel more comfortable with FMQing!