I'm an Army FW guy that did the same thing. You'll get more bad info than good from both CFIs and the FSDO. If you PM me your email I'll send you the input that I got from a guy that used to be contracted out to provide the SEL add-on to Army FW guys back in the day.

Bottom line, you'll need to go through the Part 61 table that lists what is required for a comm add-on. Lazy8s, chandelle's, etc. Be advised, however, interactions with DPEs can be a totally different experience than what you're used to at FlightSafety. These guys couldn't care less whether you pass or fail, they're strictly there to evaluate (and collect a hefty fee).

I would plan about 10-15 hours with a CFI at a local club to get where you need to be with these maneuvers.