We now have an exchange pool available of certified and modified units. There will not be any delay during your ADS-B upgrade.
Are you aware of the advantages to purchasing an avionics aftermarket program from a company who is be able to service and support the contract?
I think it is always worth mentioning the importance of maintaining a clean cockpit, especially following the installation of new carpet or interior refurbishment when lint tends to be plentiful.
Honeywell issued a revision to an Aftermarket Program Info Letter regarding Early Event Signoff Guidelines.