I bought this base for my Rikon lathe, which weighs about 150-lb with its stand.  The corner supports seem to be well made and the wheels are heavy-duty.  After reading several reviews, I decided not to use hardwood for the 4 sides - the thought of drilling all those holes, in the right places and perfectly perpendicular, didn't set well with me.  Rather, I went to Lowes and bought their 1-1/2" pre-drilled steel tubes (see photos).  The pre-drilled holes are on 1-inch centers, so they're perfectly spaced for attaching the tubes to the four corner pieces - I didn't have to drill ANY holes.  I'm sure that saved at least an hour of set-up time.