Thanks, everyone. You've given me a lot of ideas and new things to try and I really appreciate it. I'll do more experimenting over the upcoming long weekend with your suggestions.
Mike, to answer your questions, I'm not sure off-hand of the PUP height but it's a split Super II high enough to not have created prior issues with any of my preexisting effects but not "too" high because I like the clarity of some space between the PUP and the strings. My guitar, as noted, as an OBEL and UGB (I'm embarrassed to say I can't now recall if it was this guitar with yours or mine has the CAE and yours left with the other Jerrycaster I sold last year but it's one of the two). For today's initial run, I placed the Proton first in my chain in the OBEL. It's followed by my Line 6 M13 which is presently in buffered (not true bypass) mode. And I have an also true bypass Fulltone Fat Boost 1 at the very end, outside of the OBEL, that I toggled on and off when test-driving the Proton (it seemed to have no discernible impact on it).
Disclaimers: I'm happy to share whatever relevant gear knowledge or experience I have. Genuflection/payment/proof of worthiness neither sought nor accepted. I don't design, build, market, sell or endorse for pay any new music product or service. I occasionally sell personal used gear. I am an unpaid endorser of SoundScaper Productions and Godfrey Daniels Guitarworks.