On the basis that no question is too stupid, on both the DTI’s I own, the bodies have slotted dovetails, presumably for mounting in an appropriate dovetailed fitting but I can’t find any information on the fittings or how they’re mount onto a lathe/mill. Fortunately both come with a little black arm I can fit into the toolpost of the lathe and there’s a stem at the top which I can mount in the chuck/collet of the milling machine but I was curious to the use of the dovetail and if it’s worth investing in the extras?