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The tolerances were way too tight on this. Took some real elbow grease to get the screw wound into the back plate and I had to go over the four posts with a dremel to get them to fit the front plate holes. Best to drag this into a CAD program and adjust to your machine's measurements. Not something for someone to just print up and expect to fit. You're going to need to either adjust the model before printing or file down the printed part (not an acceptable option if you want a part that works smoothly).
Other than the poor fit, it does work well once it's been adjusted and a great mod for the A8.