Interesting contraption, for sure. I assume that the post also swivels? Otherwise, any lateral stresses might eventually cause that area of the blade to crack.
And, don't bash your knuckles under the handle, either. Doesn't look like a lot of clearance there? Seems like the blade should have come almost to the edge of the board, so that the handle was outside the cutting board area.
Sorry to sound critical, but you can't take the engineer out of the retiree.