The 4.3 and 6.7 have the same crisper. They are pretty much the same fridge with the same shelfs except the 6.7 is taller. Tractors1 made and sized this tray in the bottom of the fridge in his 6.7 after we compared measurements to make sure they were the same.
We removed the crisper months ago and like it a lot better. By removing the crisper in our 4.3 and ordering and installing an extra lower shelf for a 6.7 which is a little longer in the back it gives us a lot more room for storage. The crisper has the rear corners cut at 45 degree angles so you loose a lot of room in the back.
The bottom tray keeps things from rolling into the door and will also catch any spills.
We removed the freezer too and it works for US.