This is a really well constructed tool.  Design quality and craftmanship are all well spoken for with this unit.  The accuracy and overall utility this tool provides is astonishing.  But it has one crucial flaw...Just one and previous reviewers have addressed this so please excuse the redundency.  This unit should be able to manually set and store the spring angle of your molding.  Molding spring angle doesn't change!  Why does this tool require that we either measure it each time or open the legs to the spring angle?  This is nerve racking as this unit is acurate to 0.1 degrees and it is difficult to set the legs to a reading of exactly 45.0 or 38.0 degrees.  I mean you get 45.1 or 44.8 back and forth until you get it set to 45.0...What needless pain.  If you know your moldings spring angle then you should just be able to set it (via the buttons) and set it once!  Sometimes I think that the design engineers (they did a great job for the most part) lack the experience of practical application.  This leads to lack of forsite and ultimately the exclusion of a simple and needed feature of manually setting and storing the spring angle.  Oh well, i guess we just cant have perfection.  They came real close though...