FWIW, I have had good experience with the wooden bench for my 10" Atlas. It was designed based on the wooden bench Atlas offered for sale for their lathes in the May, 1945 catalog entitled "Modern Shop Equipment." (Page 13, Bench W-101 for 36 and 42" bed lathes)
By good experience, I mean once leveled, the bench maintains the precision level.
The bench I have has a top that is made from laminated 2x4's, with metal pads on top for the bed feet to rest on. The frame is 4X4's (which are really double 2X4's) using mortise and tenon joinery. All four legs are secured to the floor with angle brackets. The bench probably weighs 75-100lbs.
Making the thing out of common 2X4's kept the cost way down.
Here is the bench under construction.
View attachment 275190
And here is the finished product with the Model 10f Atlas lathe
View attachment 275191