Tutorial aaBT1s "Making A Table" step 9 D max = 1; 4 not possible

[wings3d2021a00]

Wings3D 2.2.6.1 just dl'd and installed 210414 Windows 10 64bit

Tutorial BT1 "Making a Table"
http://www.wings3d.com/paulthepuzzles/aaBT1s.html

ss_W3D_aaBT1s_210414b.html = Tutorial webpage screenshot
ss_W3D_aaBT1s_210414a1.pdf = Wings3D ss


After following and checking all steps in sequence, step 9 says "... D = 4 ..." in the bevel operation. In the box, then slab, I get, the maximum D is only 1. There is no way to get D = 4 as step 9 states. I did not see any specific instruction to enlarge the box in any way, only chop it up. The rest of the steps that include units do not match the actual modeling in w3d.
Anyone have some insight into what I missed?
Thanks a bunch.



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