Changeover regulator - no thread to mount
Have bought this Marshall Excelsior automatic changeover. Works perfect. One problem - mounting holes at the back have no thread. I am past return window, a piece of wire and duct tape holds it so...
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Would have to use a bottoming tap. A standard tap will not cut the thread very deep into the holes. Does not really matter too much on thread count. I would use stainless screws and anti seize.
