Marking Material to remove from Angle Support Brackets

This is a bit blurry - was still trying to figure out my wife's digital camera. These are the marks to show the taper line and the amount of aluminum that needed to be removed from the ends of each bracket. Many have used a band saw for this, which I don't currently possess (Xmas is just around the corner!). Some have used a dremel cutting wheel, but my attempts to do this on some practice pieces proved to be less than satisfactory. The wheel was too hard to control on such thick aluminum.

Used my Sander to grind these down - worked very nicely but left a lot a metal dust - recommend wearing a respirator when you do this.