JB - does the unit take the standard seat? If so, you should be OK, as the seat pad will mount onto the track seat unit, but the pads on the bottom of the seat pad will sit on the subframe and no weight will be taken by the seat unit.
However, if the front of the track seat unit does not have a large hole in it to allow the standard seat pad to sit directly onto the subframe, then you may be putting pressure onto the seat unit and not the subframe directly (not sure if that made sense????)
Anyhow, if you can use a standard seat pad, then this is best, and make sure that you have a large hole in the front of the track seat unit to allow the seat pad to sit directly onto the subframe and you're sorted.
If its a complete seat unit (without large hole in the front section) then you can use a foam seat pad type thingy, but you'll need to have some sort of padding between the subframe and seat unit, to prevent the seat from taking all the stress. I had this on my SPS and used some thick foam under the seat unit to prevent this.
If you're unsure, send me pics of the seat unit it might make it easy for me to tell.
Tim
