will put my 2 cents in if nobody cares.
there is no such thing as a tc9+.
i have built several triple stack tc9s and they have a tighter gap vrs the 2 1" slug closer to the gap of the 2 3/4" slugs. there is no benifet to the 3rd slug in this motor esp with the small diameter top plate it is already far passed soak.
in my eyes this is a very poor designed motor and a waste without a better top plate. in all aspects the 2 1" slugged tc9 is one of the most perfect motor designs still in todays market...