I have an Osborn EB-3 like the one Norm Abram had in his shop years ago. I've found it to be very accurate with the following caveat: Take your time setting the angles and don't rely too heavily on the detents for 90, 45, etc. Make sure the stop fully enters the detent or there could be some flex. The guide bar has three Allen set screws that adjust the bar for various slot widths.