Adjusting a firing pin bushing wont cause anyone any harm. So yes, i will pass that kind of info along.
Testing powders, primers and bullets is another thing that gets passed along. Others think primers dont make a difference, i show the difference they make.
I dont have to explain anything to be honest, if you or anyone have questions, Ask. I get PM's here and on other forums asking for advice and help and i do my best to help them out.