Walked out of the FSDO yesterday with a shiny new license. For those that asked, the license reads: "FLIGHT INSTRUCTOR". In the ratings and limitations section it will further define your license. For instance mine says "AIRPLANE SINGLE AND MULTIENGINE; INSTRUMENT AIRPLANE". Be sure to take proof instructor qualifications in ANY aircraft class or category that you claim on your 8710. The FSDO's are still learning the process and their 8900.1 order has not been updated - so be patient but persistent!
It takes a little time and effort but is worth it. I've been retired 4 years. Used the
www.sheppardair.com prep. Can't say enough about those gents. BTW - they have a great FE prep - if and when FEDEX starts hiring again!