If there is a certification for grinding then Jakob could pass with his eyes closed. With his and Jacks help we got all ten porthole frames welded together and ground. The next step is to bolt the porthole rings on and weld the nuts onto the frame. So should the nuts and bolts be steel (39 cents each), stainless ($1.50 each) or bronze ($10 each). Frankly, bronze is a non starter.
And many thanks to Chris Faith for the awesome photo on the bottom of the post. It is a composite of several photos taken with long exposure times. See “light painting” for more.