I'm ignorant regarding the "innards" of pedals and trying to figure something out regarding vibe pedals. Over the past several years I've owned several vibe pedals and all but one has either been returned or sold due to rf issues in my neighborhood (same with fuzz-face and treble booster pedals). From what I've read online, Jimi Hendrix also experienced radio interference at least once when using his univibe, but I couldn't figure out why a univibe would have such problems, and I've never met anybody who experienced such issues with their vibes. After buying a couple Black Cat Pedals, I noticed that they made a "high-end" vibe pedal but, instead of using an led for the "on/off" light, they opted to use a photocell. I'm not a wealthy man, and the Black Cat Vibe wasn't exactly inexpensive, but I took a chance and purchased one. It's been several weeks now, using it almost every day, and much to my delight: no rf issues!!! Question: does the Black Cat Vibe's use of a photocell, rather than an LED, account for the lack of radio interference? I've tried Fulltone, Foxrox Aqua-vibe, DLS Versa Vibe, and experienced radio noise. I'm assuming they're all very similar regarding components and design, so I'm wondering if the LED was the problem. Thoughts?