Item 6 indicates that an engine used for aerobatics shouldn't be considered a 2400 TBO even with the right pistons, and the degree of use for aerobatics should be a determining factor as to how much less than 2400 hrs.
I guess it's not really an issue anyhow, since i'll likely lose my medical before i'm able to put 2100 or so hours on her. I suppose it could increase value though, if it were to already have the right parts in it.
