Terrific step-by-step instructions and great detail for anyone embarking on this kind of change; thanks, @Richard_Sather, for another excellent Community Tips > Forum Leader tips!
You reference 🚦 Custom Task types: What you need to know before you go all in in your Resources here, and I recommend that anyone considering this change read that post closely first to make sure they’re comfortable with the current state of custom task types functionality before they begin using them, either for conversion of existing section or custom field approaches, or for a new usage. There are a few dozen 
and 
flags in that post, some of which you may consider gotchas or must-haves.
Thanks,
Larry