No matter what I try, I can neither enter nor paste an Offset or Duplex for a 1.25m repeater. Programming 1.25m repeaters was ultimately what was motivating me to do this work.

Even if I just unconditionally add 220-225Mhz to _txbands and comment out my special handling of being sensitive to the current 52.200TX setting for testing, if I type "1.6" in the Offset column or - in the Duplex column, it silently goes away without printing an error. It works fine for 2m and 70cm bands. I've looked through chirp_common.py and I haven't been enlightened. I'd love a pointer to where I could next look to fix this.