Hi Tyson,
I've also replaced the series cap bypass for my mids, and highs from Sonicap gen 1, to myflex kpcu.
Initially i felt it as quite a step down, because the resolution was much worse compared to the Sonicaps. The tonal balance was better, because my speakers did need a bit more warmth in the highs. The Myflex did just that.
After two and a half months of use, the resolution has shown great improvements, but i still think the Sonicaps give just a little more detail.
But the myflex sound so incredible realistic. I will not change them back for the Sonicaps bypass. I feel like the music is even more natural, and played live in my room. Like you can almost feel the musicians playing in your room. The burnin time is also ridiculously long for these caps. In my case they are still improving after 2,5 months of use. They are worth it.
My highs did need just a hair more warmth, the myflex took care of that.
Al other caps are bypassed with sonicap gen 1's. Also a great sounding cap.
Good luck with your project, have fun!