I have an Atlas 3981/Craftsman 101 12" lathe. I'd very much like to put a slotted cross slide on it for light milling work as I don't have a milling machine. I know where I can buy an Atlas Clausing slotted cross slide right now for a decent price, but it looks to have come from a larger machine. The female dovetail on the bottom of the slide is about half an inch wider and about an eighth of an inch deeper than the male dovetail on the top of the carriage.
So here's my question. Is it worth it to get someone to mill an adapter to fill in the larger dovetail until it fits the smaller one? There's certainly space for one. My gut says this would introduce instability and reduce rigidity but I'm not a machinist. What say ye, oh smarter and more learnéd?