Peninsula RV

First trip RV'ing this year. 2 days in and I get a leak at the toilet. Quick search shows these folks have RV parts. I come in with the part # and photo, and the gentleman behind the counter says, "This will work." He hands me the plastic bag with the part and what appears to be the necessary fittings. Here now is why I am rating these folks a 5; he says hang on, you will need these, and hands me a couple of slip washers off the wall. Experience, knowledge, and the willingness to share; if I hadn't been given those 2 little washers, I could not have made a successful repair. Friday 03-09-2018, I should have posted sooner.