I dont trust most do all meters. Its very hard to do accurately. The meter on vhf and hf is a compromise usually without expensive circuits. And pep reading meters dont use caps for hang time. If it works without external power its not true pep reading. I wont attack mfj. They are a ok reference point. I use a older 989c tuner and the meter is decent but never quite agrees with my many radios. Its close. I think specific meters for specific bands is better. No matter the brand. And you wouldnt wanna change jumpers to go to a uhf to hf or vhf rig. So do all only works if you have a shack in the box like ts2000 or something. I think i read somewhere bird is only 15% accurate? But people sure swear by them. Maybe the lp100 by telpost is the ticket? This is a good topic for sure.