I had a Magunm that I really liked. That is till I loaned it to one of the heli guys and the big blade snagged it out of his hand and kind of totaled it. He bought me a replacement GloBe. It has more features than the Magnum, but it just isn't a good tach. I get some realy strange readings, IE my Mag 91 four stroke at times reads 23000 rpm at mid range. Turn it off and on a few times, wiggle it around and change the angle to the prop and it will settle in and give what I presume are accurate readings. Absolute readings are not what I have to have, but rather a good consistant reading at near idle and near top end of 10,000rpm.

I've got to replace it one of these days.

Don