Bill,
Mssrs Optiz and Marotta's experience will guide you well. Don't underestimate the guidance the local FSDO might provide to you if you contact the FAA first, instead of using them only to troubleshoot. They're not supposed to be obstructionists. That 505 looks like a great ship; good luck with it.

https://www.faa.gov/licenses_certifi...port_aircraft/

https://www.aopa.org/training-and-sa...raft#importing