"Si non convivare, noli tintinare" ... I may obtain a suitable bell and plaque with those words for the door to the AWAD arboreal fane

I would counsel caution here. The entire motto is eerily reminiscient of Si Non Oscillas Noli Tintinnare, which was engraved on a brass plaque on the door of Chicago's Playboy Mansion. Your proposed motto may be even more extreme: google's language-tool translates the italian word convivere as to cohabit.