And I didn't get a picture of this, but I drilled a long notch in the side of the big block in the back so it can slide forward and backward as the blade tracking is adjusted.
I drilled a hole in the support arm to hold a carriage bolt that goes through that notch. Normally with pine, you can just tighten a carriage bolt and crush a hole in the pine with the square part of the bolt head. But with hard maple, I cut a square with a 1/4 inch chisel around the hole.
And this is the whole thing assembled. You turn that black knob on the side and it loosens the carriage bolt so the entire blade guide assembly can slide forward by as much as an inch.
other views:
