I extended the 3/32" plywood floor to the back side of the station "E" crosspiece at the aft side of the spar cutout. As for the 1/4" ply, I considered it as part of the load structure for the lower engine mount and left it in although I am also planning on hanging my rudder pedals / brakes from the lower shelf. However, I didn't like the abrupt step at the aft end so I extended it about 3" beyond the aft edge of station "B" and tapered it (standard 12:1 scarf taper) to a feather edge on the top of the 3/32" ply. Both were glued together with T-88 of course.
Allen G. Wiesner KR-2SS #1117 TD/ CorvAir 65 Franklin Street Ansonia , CT 06401-1240 203-732-0508 allenw65 at comcast.net ----- Original Message -----