My app could use Synergy and contacts, but I need to know the limitations of the Notes/Reminder fields. Specifically,

What is the character limit?
If a contact was created/syncing with EAS, but I want to sync with the Notes section, can my app create a new contact and link it? I think this would allow me to update it via Synergy.
Can the data be formatted in the contacts app in any way?

Thanks in advance.