Ready to migrate from C5 to C8Pro - Questions

Ready to move from C5 to C8Pro - Questions
I have read the migration doc and searched a lot of other migration posts that help but still have a few questions before I lose my automation for a (hopefully short) while.

I have no zigbee or zwave devices active on the C5… radios not enabled. Currently all those devices are controlled by HomeSeer and plan not to selectively move those to C8Pro until after I have stability. I plan not to have the C5 active, so no mesh issues.

I have the following running on C5:

Apps table:
Amazon Echo Skill
Bond Integration
Ecobee Integration
Export/Import/Clone
Hubitat Dashboards
Maker API
Rule Machine Legacy
Echo Speak 2 when Switch2 Becomes On
Echo Speak OfcMDet Batt Low when Switch4 Becomes On (Paused)
Set Ecobee to AWAY
Set Ecobee to Home
Simple Automation Rules

Apps Code Table:
Echo Speaks
Echo Speaks - Actions
Echo Speaks - Zones

Drivers Code Table:
Alexa Notifictations Driver - corerootedxb - used by 1 device
Echo Speaks Device - tonesto7 - no devices listed
Echo Speaks WS - tonesto7 - no devices listed
Shelly GU10 -- sgraban - used by 4 devices
Shelly Switch Relay - Shelly USA - no devices listed
Switch Timer with Reset - Botched1 - 1 device
Virtual contact with auto-off Switch - 22 devices

I have read that I should leave the C5 zwave and zigbee radios off for the migration upload and check only "File manager files" for the restore on the C8

Maker App is syncing with HomeSeer. From various posts, I think that if use the current C5 static IP for the C8, then MakerApp will have no migration issues. Agree?

Are the 3d party drivers included in the migration? Do they need to be reinstalled? Are there issues with the devices that use them… e.g. the 22 virtual devices that are built on the Virtual Contact with Auto-Off Switch?

I have not been able to find posts on migration issues with Ecobee. What steps will be required to get that comm going again?

I did find some migration pointers for Amazon Echo from @bertabcd1234 so hopefully OK there.

I assume I'll probably have to rejoin the 4 Shelly bulbs somehow… not important.

See any other sand traps?

It all gets migrated over.

If you keep the same IP most stuff will just start working again. Some "auth" based services you may need to re-auth after migration. Especially Echo Speaks if you used the cloud callback URL, since that will have changed..

Take a cloud backup from the C-5, and then power off the C-5. You won't need it again. On the C-8Pro, register it and then go to Settings: Migrate Hub and follow the prompts. You don't have Z-devices so ignore the Zwave/Zigbee options.

When it reboots after the migration, you should be identical to the C-5. Everything should be there and working.

This are high level advice, because the documentation is correct.