The FCC is a PITA, but I remember compaqring notes with the Brits, who had to renew their radio licenses much more frequently than every 10 years...
Under the old system, it was important to check every box for equipment
you could conceive of using, because adding them later meant another fee. Did I understand that under the new system you can make changes in your license for nothing?? I just changed my address online, but that never counted for extra $$.