We've added support for the following additional package types:
- Small Flat Rate Box
- Medium Flat Rate Box
- Large Flat Rate Box
- Regional Rate Box A
- Regional Rate Box B
- Flat Rate Legal Env.
- Flat Rate Padded Env.
This is in addition to our existing support for First Class and Flat Rate Priority Envelopes.
Here's a screenshot of the new UI and package types in action:
