The shitty part is that it need not have happened.
In order to protect everything from the rain, the parts were put in boxes and stored in the storeroom. I needed to grab something out a few days ago, and the blade carrier accidentally took a tumble into the box next to it. I had a quick look then, fearing I may have snapped a flywheel fin, and obviously missed it.
Tyler, I'm guessing it has held ok? That was my first though, using some metal "weld" epoxy. My second though was as you suggest Gadge, Dremel the opposite fin off. My third and current train of thought is that I don't like either the first or second thoughts. The first because I'd hate for it to let go in service, the second because I haven't learnt yet to accept "good enough" on my projects. And I take great pride in maintaining all of my equipment to the highest standards. I'm entertaining the idea of it getting professionally fixed. Or finding a replacement flywheel.

I apologise for the mini-rant. I am just a bit upset when the level of effort and care otherwise put into the project is nothing but 110%, with limited space and tools to boot. I had a few dodgy aerosol cans of paint let go today as well. Character building!!
Let's see what tomorrow brings. I appreciate your continued assistance in this project.