Originally Posted by L473ncy
Also as far as the Madbulls go, for some reason their readings *can* get a bit wonky I believe people have said it relates to having low battery in the unit.
Yup low batteries, but it usually starts flashing or display goes weird when batteries get low so it's pretty obvious.
The other thing is when too many BB shavings/pieces get inside. Occasionally I have to open it up and dump out the dust/crap that accumulates inside, and wipe/wash off the emitters and sensors. If you don't it will read wrong, like last time it did that, it was reading 40 or 50fps too low.