Vince,
Congratulations! How do you like that midrange, eh? Probably not sounding quite right with the gaping hole of the rotting passives, but should have an idea of their potential.
Not quite following the "pseudo" version 2 comment. Is the pseudo not adding the 10uF capacitor? The series 2 is when you plug the hole where the two rotten passives are (cover with wood and glue, seal edges with caulk), remove the 10" driver, wire the two 6.5" in parrallel (currently they are in series and parrallel with 10"), add the css 10" passive (5 washers (counter weight) is good starting point for tuning per memory), and add 10uF capacitor across the approximately 30uF capacitor that you have. Sounds like you are doing everything except for the 10uF cap. The 10uF cap is for the midrange section. Below is a quote of a post concerning why to add the 10uF cap. Not sure about the explanation, but the 10uF cap will shift the midrange fc up and the addition of the 10uF cap makes the total capacitance more inline with what is used in the RM-40 and RM-V60.
User G E put a post on the modification with pictures that I found quite helpful when I did the conversion.
https://www.audiocircle.com/index.php?topic=137131.0The spare 10" drivers would be quite valuable for an RM-40 owner looking for spares to support their speaker.
Again congragulations and have fun with your newly acquired speakers.
The woofers and mid panel circuits are parallel and to some degree isolated from each other. But lowering the woofer impedance 1/3rd (6 Ohm to 4 Ohm) increases current through the mid panel circuit which decreases effective value of the series capacitor bank, shifting the pole higher. Adding 10mf increases capacitor value, shifting the pole lower.
Lowering the woofer impedance has inverse effect on the woofer series coil, increasing it's electrical effectiveness, which would shift the pole lower if there was no other change. But in this case we also remove one 10" side firing woofer, and leave two front firing 6.5" with (likely) more mid range output. The woofers are integral component of the electrical crossover so we can not predict changes in the acoustic pole and slope, pre vs. post woofer modification.