I said that I have 3 tillers that are HD, not that I only have 3 tillers... I'm still waiting for you to tell me how many "your sample" of HD tillers, is??? Have you ever even used a HD tiller?
All HD tillers that I've seen, DO have two bolts per blade, if you can name/show me otherwise that would be great, unless you consider a garden tiller HD.
I do commercial tilling, (mostly fields) so I do have an idea of what works and what a HD tiller looks like. I have over two thousand acres on one of my Howards, and it's still going strong with only normal maintenance and a minimal repairs.
No false statements made here, but I must have made some you didn't like. lol
SR