Thanks for all the feedback. I certainly enjoy the challenge. After all, I'm doing this for fun; not to receive TV. It's a good excuse to get me outside on these nice days.
Since I don't have or use a satellite meter, I use the remote monitor ability of the Edision to see the receiver's received level in dB on my phone at the dish. The reading is given to two decimal places. Once transponders are scanned in for the first time, I can quickly check level on each tp and this allows me to choose the best settings for balanced levels. I can't really check for minimum level on the wrong polarity since minimum means no tp lock and no reading. I guess this is one situation where a satellite meter could be useful. Occasionally I use the GT Media remote monitor ability since its reading on my phone is more damped so it's actually easier to know when peaked.
I only quoted an SQ reading since when actually watching TV, the GT Media V9 Prime is able to take a given signal quality and do more with it. When near the C/N minimum lock of 9.4 dB as Weigel is before being fully tuned, the GT Media shows a clear watchable channel whereas the Edision is breaking up. So the GT Media appears more sensitive though I'm not sure this is the correct term. At the moment, I am getting SQ 72% on the GT Media with a completely clear METV picture. On the Edision, I'm seeing from no lock to peaking at 10.2 dB locked and a distorted picture. So at the moment, the Edision is not useable whereas the GT Media is perfect. As a reference, the GT Media V7S5X is showing the same SQ 72% and perfectly clear picture.
Using Lyngsat, which is pretty accurate these days, I checked adjacent satellite frequencies. 103W SES 18 is a powerhouse whereas 99W Galaxy 16 is likely less problematic. In all cases but one, adjacent frequencies that are the same frequency as on 101W are on the opposite polarity. There is one example where there's just 4 MHz difference and on the same polarity. This is the Jewelry channel (101W) and the Victory channel (99W).
I think the actual solution is just to put in the time and effort when on 101W to position the LNBF precisely in all three dimensions plus orient the skew also precisely to balance on all frequencies as much as possible. My complaint is that the way an LNBF is positioned with just three points of contact between three screws makes this task awkward coupled with the fact that you are standing in front of the dish and blocking a significant amount of signal with your body. At least I don't need a ladder and can reach the LNBF assembly while standing on the ground. On weaker tps, my body attenuates the signal enough that I lose lock while standing there so I must adjust, move away, read, then adjust some more. It's not a good way to do precise tuning. Not complaining, just stating facts.
On most satellites, this above process is much simpler since the transponders are stronger. So I don't need to move; I just watch the reading and adjust at the same time.