Hi All Drone escapes can be simply engineered by cutting a small portion off the end of the nozzles that are provided for caulking compounds. See http://website.lineone.net/~dave.cushman/coneescapes.html http://website.lineone.net/~dave.cushman/shaparewbd.html Best Regards & 73s... Dave Cushman, G8MZY Beekeeping & Bee Breeding Website... http://website.lineone.net/~dave.cushman