Advice when migrating from AWBS to WHMCS

I had posted in the Marketplace, looking to purchase consulting services to help ease our migration from AWBS to WHMCS, but no takers.

Anyone out here that has come from AWBS to WHMCS, that is willing to share any war stories, to help us through this migration?

I'm thinking the general process will look like this:

Prior to conversion date:

1. Purchase license
   
2. Install WHMCS in temporary sub-domain
   
3. Do the basic WHMCS configuration
   
4. Customize look and feel
   
5. As a test, use AWBS-to-WHMCS migration script to bring in current customers and data
   
6. Review the migrated data, come up with a list of things we will have to manually do
   
7. Set a date for official migration and notify customers of upcoming changes.
   

On the conversion date:

1. Shut down AWBS site so no further transactions take place (stop all crons, too!)
   
2. Dump the data we originally imported (not sure how to do this, without losing our config/customization)
   
3. Move the AWBS installation to another subdomain and password protect it, so we can refer to it later
   
4. Move the WHMCS installation to our primary billing domain (does this require a license change?)
   
5. Re-run AWBS Import Script
   
6. Do all the manual things we documented (Affiliates, Other packages, Hosting Add-ons, etc.)
   
7. Go live
   

Am I missing any steps? Any advice would be greatly appreciated!

- Scott