Summary80mm opening should accept any single battery clockworks. Glue dial to disk, then attach clockworks to disk. I painted the clock, then attached the colored flag covers, then attached clock assembly to Castle Clock body. I printed this with 10% infill and used no support.Print SettingsPrinter: Da Vinci ProRafts: NoSupports: NoResolution: .3mmInfill: 10 to 15%Notes: Post-PrintingPrinted in ABS, spray painted metallic gold.