[sunman]

The Emerson frame pix are in the “Emerson mods to CRII frame “ thread.
Steel plate at bottom of frame on 3” wide outside frame piece and 1” up on main 2” x 4” inside frame rail. It scales out in the photo.
That is an Emerson rite?
Photo 2 in this thread shows the back seat mount at bottom of frame same as an Emerson’s would be. Front is 1” higher for some seat tilt.
After measuring them the seat sliders are only 3/4” thick.
CR seat shells have a 3/4” bubble on bottom they almost touch floor with slider on seat.