Golden Rule of Thumb - Check the Release Notes of the ZD version you wish to upgrade to,
in order to determine if all your current models of AP are supported.
Recommended code: ZD1100 firmware 188.8.131.52.14 MR3.
Release Notes - https://support.ruckuswireless.com/documents/814-zoneflex-9-8-3-mr3-release-notes
Under 3. Supported Platforms - both zf7372 and R700 model APs are supported!
The most enhancements and bug fixes will be in this 9.8.3 over 9.6.2 release for ZD1100.