The chassis were pretty consistent. No issues to this point with any 400 application. The only alignment issue has been with the heatsinks on the 700's. Some 700 heatsinks need the mounting holes taken from a"C" to a "B" drill.
The 400 backplane board kits are Quasi/full comp with a few component changes and everything is included to go either way , except the outputs.
The PEM standoff clamps are not necessary and are a product of our wonderful NavLinears mind and 3D copier. Joe uses a wooden dowel....
The driver board has to be populated in FC mode, yes...