Hey bti,
Love the loyalty to v19.16, sounds like it's been through thick and thin with you. As for API access request, you're on the right track. The dev team's pretty snappy— most requests get sorted in under 60 minutes, as long as it's within business hours (Monday to Friday, 9am to 5pm NZT). If you've submitted it around then, you should be good to in no time. If not, hang tight— you'll be plugging in those integrations before you know it. While waiting, you can also check this link for more info.
Cheers,
Doreen