Hey railfan,
Thanks! I also find it interesting how BPSFL behaves, same observation as you.
As for your EQ increase, my experience exactly mirrors yours: my first cycle, EQ went up while the cycle was active. I figure it was, as you say, the healing process of the ligs as they start getting stretched. Then when I stopped, EQ also went down significantly. What I found is that subsequent cycles, as I started to use higher weights and more sets per week, led to EQ decrease during the cycle. This was accompanied by great BPSFL gains (and eventually BPEL gains), which leads me to believe that beyond a certain elongation of the ligaments, EQ is bound to go down. In support of this theory (and I think I have stated this already), it seems that many big length gainers started using ED drugs at some point and report longer lengths when taking them.
I do not take rest days for my weighted kegels as I find that 24 hours is plenty of rest for these smaller muscles. I would say that nowadays I do something closer to 6-8 sets of 12-20 reps, in the mornings. What I do is I first get erect and get around 10 minutes of edging in - this helps in maintaining subsequent erections. Then I get to 100% or close to 100% erection by edging, perform one set, resume stimulation for around 1-3 minutes and perform the next set. You will notice that your erection noticeably goes down from each set. This is to be expected as these strong contractions of the PC muscle, in my experience, kind of mimic what would happen during an orgasm, so your erection naturally wants to subside afterwards. What also leads me to believe this orgasm-mimicking hypothesis is that when I perform normal edging, I either have to ejaculate or accept the fact that I will be extremely horny until I get a release. With the addition of the weighted kegels however, I do not get this effect despite getting very close to the PONR throughout the session.
Hope this helps, and feel free to ask more questions! I am convinced you will notice great EQ gains after a few weeks (maybe even less) of these. One last tip, start light: probably around 8 ounces would be a good starting weight, and you can warm up with even lower weights.