Re: Stairway Wainscoting
Measure the angle that the staircase deviates from horizontal. Often it's around 38*-44*. If you set your miter box to this angle, it will give you the top/bottom cut of a vertical trim to intersect the stair angle. That's the way miter boxes are set up. Same angle if you are using a speed square. For the end cuts of the raking members, you use the complement of that angle; the first angle subtracted from 90; if 44*, the compliment is 46*; if 38*, it would be 52*.
Remove not the ancient landmark, which your fathers have set.