we have the vega on a smaller 22" jet lathe. I have the hss cutter in for now, but it cuts ok - no way could I take a 3/4" pass, maybe 1/8"?? it helps to have a reversible lathe. vega on one side, tool rests on the other.
I am disappointed in the copying capability, as it tends to cut different going left vs going right. and you have to kind of feather the cut depth with the lever as it goes. it is entirely possible I have not learned the correct operation of it also.
what I do use it for is rounding the blank - quickly.