bigted, that explains to me why the thing broke in the first place - which I couldn't understand, it being out-of-the-way as far as me running the mower into anything that would break the rim. But now I see what you mean - a stone thrown by the blade would do it. And dammit, it was the front right, as you say!
I'll swap them around, but now see that due to more stones, eventually I'll probably have to buy new wheels. Thanks for the knob link - I did see that page before posting, but wasn't sure if the rear of that knob was the same.
Broken blade boss - well, if they work ok with just one tang, then I'll live with it.
Ta, Ian
