Why are you building these 4333's?
Wait until you hear them before you modify or add.
To sound like a 4333 you need all the original drivers, horns and crossovers. There will be no midrange "bummer" if you do this.
Talk to someone experienced in audio speakers or read some basic HiFi books to understand how a speaker system works.
But basically the 4333's 2235 woofer handles the bass or lower frequencies up to 800 cps or Hz. The low crossover transitions frequencies above 800 to the 2425 midrange driver and its 2312 horn. The shorter 2307 and 2311 horn is not generally used below 1200 Hz. The horn must be able to couple the attached driver to the listening field efficiently at the lower 800 Hz end and that is why the longer 2312 horn is used. The high frequency crossover passes signals above 8500 Hz to the 2405 high frequency driver with integral horn.
Horns and drivers lose dispersion and sound clarity if used above their intended frequency range, and lack power handling and air movement capability below their intended frequency range, so that is why most systems use multiple drivers.
I texted this on my phone so hope it is understandable.