No weld grinder. Troubleshoot me.
I'm building a grinder based on the plans for the NWGS from USAKnifemaker. Here's the thing. The plans call for 1.75 inch, 2 inch, and 4 inch square tube steel. I happen to have access to some free tube steel in sizes of 2 inch, 2.25 inch, and 3 inch. So, of course I'm using that instead. The two things I see that may cause problems with this idea are 1: I won't be able to use commercially available tool arms, and 2: I may have to bolt the pillow blocks to a piece of plate steel that's 4 inches wide.
So the question is: What other problems do you think I might encounter?