On my ES I fabricated a couple of stainless steel brackets from fairly thick sheet metal (forgot how thick). They are each bolted to the spar carry-through with 2 -3 bolts the spar itself carries the download, with any upload carried by the brackets. I used -3 bolts and nuts to hold the seat rail to the brackets. In the front I used aluminum angles with nutplates and long -3 bolts. Works good and the seats are reasonably easy to get out. I also put 1-inch phenolic spacers under the front rails to tilt the seats back and give a little more leg room.
Gary Casey
Has anyone with a IV-P found a good way to move the front seats aft about 3=
-4 inches?=A0 I don't need the rear seat leg room, but I could use more in =
the front.=A0 Moving the rails rearward would cantilever them quite a ways =
behind the spar box.=A0 I haven't figured out how I would support the rear =
ends of the
rails.