A suggestion for growth
First, I applaud the expansion of cars included in the FA class. It will bring Fast and interesting cars to the Nationals. As a DSR racer for the past 8 years, I appreciate the appeal of cars with motorcycle engines. Use of motorcycle engines is a rapidly growing trend worldwide. Their advantages have been well reported in the motorsports media (including SportsCar) over the past several years.
So, how about including a motorcycle engine option for FA? Say a 1300 to 1500 cc displacement limit and an 1100-pound (with driver) weight minimum. There are already several manufacturers making such cars (Van Diemen, Speads, SIS and OMS for example) and I am sure others such as Stohr would join the fray. I, for one, would love having LESS fiberglass to repair.
Continuing with this thought, a 1000cc motorcycle engine car could be added to the FC mix and perhaps a 600-750cc engine could be added to F500 (thus appealing to the FSAE graduates) or even the FF mix.