Please let me know exactly what you mean by "change the correction" and I can look into it.
FWIW, my ideas about adaptive calibration would probably cover those issues, though it might take a while to adapt.
In my experience, though, unless you're very close to the pole, the guiding angles (and the approximation that the RA
and DEC directions are perpendicular in the image) suffice, especially given the seeing noise.
Absolutely--you can use the GPG RA guider with a fixed period.
This is a view of the GPG options page (stretched a little so you can see anything)
Just set "Major Period" to the period you want (122s) and uncheck "Estimate Period" so it doesn't re-estimate that.
With respect to the guiding algorithm, you should get about the same RA guiding with Ekos using GPG as with Phd2 using PPEC.
You should be able to set the same parameters. (Of course the systems will differ in their guide-star detection, tracking, calibration, ...).
Actually, assuming you're powering your equipment outside with your house's A/C, you may not need to "snake a cable from outside".
I've been successfully using these: www.amazon.com/gp/product/B06WP2ZT5N/ref..._title?ie=UTF8&psc=1
powerline ethernet adapters and they work well, and are more reliable for me than the WiFi was.