Any tactile you add will complement the sfx/pt style of motion. I only have the 239's on the pedal tray and seat with one LFE on the seat as well.
You will find the combo of lfe and tst on the seat is very good and like others I dont notice the noise unless I am listening for the noise.
Isolating the p1 pedal tray will be a little bit determined by how you mount your pedals. The easiest way would be to have your pedals mounted to the top of a plate, the tactile mounted on the underside of that plate and an isolator of some sort in each corner that is attached to the p1 pedal tray. You would have to remove the center piece of the pedal trays 4040 to allow the tactile to hang down.
There are various options for isolators. Around here you will usually see something like the racebass isolators as well as this style of antivibration mount
www.hiq.co.nz
I have found the racebass work well on the seat but then preferred them in combination of the above style of mounts on the pedals.
The LFE/tst combo will give you something nice but you are also really going to like the motion, the one special thing about a platform mover is heave and the amount of force than can be felt when a platform suddenly drops and lifts when going over a change of surface. You will find that tactile can help enhance something like a rumble strip but then the motion really give you a kick in the pants if you mount the sausage kerb with stiff suspension.