On the other hand, I have a South Bend milling attachment that I
adapted to my Logan 9" lathe, and I have given up on using it. I had
two problems with the setup. First, the adapter mounts to a circular
dovetail on the cross-slide, and while my adapter seems to be stable,
the setscrews that clamp onto the dovetail like to slip at inopportune
times drawing the work into the cutter and causing a crash. The second
is that my saddle is designed to take load down, bearing on the ways,
but has maybe .010" play if something wants to lift the saddle. Again
this play has caused a crash or two if its own.

Funny how pieces seem to move gently away from a milling cutter but, if
they are going to move into the cutter, they always seem to jump. Must
be a positive feedback loop.

Some lathe designs seem to tolerate milling much better than mine. I
gave up on mine and now have a Clausing mill to go with the lathe. Not
too many crashes on the Clausing with the 3" Kurt vise.