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scraped
The 4D is tried and true; it’s been around a while so there are some good mappings already done and floating around. Look for mixarkitect’s mapping. The 4D is TSP certified so yeah your turntables will work on it.
But if you really like the jog wheels on your S4 don’t trade it. The jogs on the 4D are worse than worthless from what I’ve heard.