Hooked the 19's back up again last night & tested the difference with the horns dampened. Pretty much the same at low volumes but when you crank it up it stays a lot cleaner. So the sound is smoother at higher volumes & less congested at those volumes. This was easy to do & very inexpensive.
Then tried putting the resistors in place of the L Pads. In my bright room I have found that joining the high frequency wires together is just toooo bright, so I put a 3.3ohm 10 watt resistor in circuit & this, to me, sounded much better.
I then put a 10 ohm 10 watt resistor in the mid circuit & this made a significant difference.

I would describe the sound now as a lot smoother & more detailed but still with that nice attack & brightness, without the glare.

The resistor mod is definitely worth doing, although you may need to experiment with different values to allow for your room acoustics.

Cheers,
John