Here’s another trick that may (or may not) help, go from high to low.
So for instance your example Plant City.
Airspace above down to the surface:
Class A down to 18,000’
Class E down to 10,000’
Class B down to 3,000’ (it’s underneath that segment)
Class E down to 700’
Class G down to the surface.

Lakeland next to it from high to low:
A,E,D to the surface within 30NM veil.