I used a 1400/2 rail across the longside of the MFT table to use it as my outfeed table. I have seen versions using the MFT in it's true form as an "L" off of a tablesaw, but I don't have the room to do that.
By taking off the legs of the MFT and building a frame underneath, I was able to maintain the clearance for the outfeed on my planer, keep the MFT coplanar to my tablesaw and still have all the functions of the MFT.
I did a short podcast to demonstrate this. After watching the video, you may have more questions than I answer, but just drop me a line and I can see what I can do.