Yes 3 bolt hole and the “spindle flange” is all one piece.Not much to go wrong with a 4-jaw- the accuracy is dependent on the operator not the chuck's internal scroll mech
Surely Chinese made so functional but not high-end; no better or worse than the machine itself- made to a price point
I believe you have a special spindle mount so it's the easiest option if not the least expensive- probably fine for hobby use
Small foot print needed.Second option.
$250 is a good start on something better, at least around here.
John
Limited time no heat in building so I get a handful of weekends before its just to cold to care, lolI'd suggest picking a representative project with some scrap material to test. General consensus, and my experience, is that although the lathe portion can be made to perform the mills rarely are.
Bes of luck and let us know what you decide.
John