That TTY bolts cannot be reused is not an opinion, it is a fact, and the reasoning is because of physics and what happens when you tighten them to yield.

That TTY bolts need to be used there is an opinion. It's not MY opinion though, it was the opinion of the mechanical engineer that designed the part. His is what's called an EXPERT OPINION as he his highly trained and qualified. He also had access to any and all data needed to form an opinion on the clamping force necessary for that plate to do it's job. He also had very specific, quantitative data on what exactly that plates "job" was.

For the opposing view, we have "Lambeau". A home mechanic with no engineering degree, no access to any data on the forces the plate is subjected to, and no idea what a TTY bolt is as he thinks they are reusable, who is justifying his opinion based on the anecdotal evidence that he reused the bolts and has driven 100,00 miles now with no negative effects that he can see.