Dust Cover requires milling = FALSE!!!
I did mine with dykem and hand files - a sharpie and sandpaper. I would have used a mill if I trusted the local gunsmiths, but that's apparently not a thing around here (north AL)...
I think I even posted pictures of the process somewhere...
With the Single Action Frame it is necessary. It was said that .5mm was needed to be removed from the sides and bottom. I actually went to 1mm all the way around instead because the slides kept contacting. I lightly polished the area up with 400 grit to even the area out. The SP01 frames I was able to do by hand rather easily.
There is nothing stopping you from filing/sanding the S/A dustcover area but the chances of it being done evenly, like on an end mill, on both sides and the bottom are pretty slim. If you want to risk it to save a few bucks, that's on you. I lost a Custom slide trying to be cheap a long time ago.
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