I just made the jump with the outbound NAT to SNAT conversion using the NAT migration tool.
This is working as expected! Thanks for that. One minor human error occurred here. When I imported the CSV file, there was a validation error with one of the (non-activated) old outbound NAT rules.
I ignored this warning because it is no longer in use.
I clicked the [green checkmark] and the window with this validation error stayed open. I clicked the green checkmark two more times and then decided to click the [ x ]to close it.
I noticed that my SNAT has now been populated with three times the same rules ;-). Maybe a control function can be added to the migration tool to prevent importing the same rules repeatedly if someone accidentally clicks the green checkmark more than once?