TCW Safety-Trim
I decided to go with the TCW Safety-Trim. It kills several birds with one stone. I mounted it on the outboard side of the F-727-L Baggage Rib. I put some nut plates on the inboard side of the F-727-L for the screws. My baggage floors are removable so I can get to the Safety-Trim if I need to. However, so I wouldn't have to pull the floors to adjust the two servo speeds, I just drilled a couple of holes in the baggage floor and used a couple of Heyco SMP F-375 Flush Head Sheet Metal Plugs (they are made of rubber) to cover the holes.
I hope this helps.
Jeff