Single zylinder set ups are pretty simple . 5 mains 5 pilots screwed to a alu plate . 10 hol;es >10 threads . Multis are a different story . For the Dellortos I use a old metal Metabo Drill case , kitted it out with foam compartents to contain the different slides , needles , jet plates and spares . I must say it was used more by others to help them out on the day ,than by myself . If van engine is on song , the plug looks right , I leave it alone.