I buy a lot of broken guns and do not shoot often.
I rebarrel guns.
The parts I buy for parts wearing out on my watch is less than 10% of the parts I buy.
I have been getting parts from Brownells for ~18 years.
My youngest brother has been getting parts from Numrich since the early 70s.
The word 'forum" does not mean "not criticizing books."
"Ad hominem fallacy" is not the same as point by point criticism of books. If you bought the book, and believe it all, it may FEEL like an ad hominem attack, but you might strive to accept other points of view may exist.
Are we a nation of competing ideas, or a nation of forced conformity of thought?