An entire fleet of Canadian Pacific passenger cars from Geoff Gooderman shells, three, soon to be four Bill Denton CBQ and MIL Rd shell based cars, four Jim Stillman super domes/skytop lounges, a couple of Kaslo engine projects and one of Lou's 0-6-0 shells has given me the background to say that there is no issue whatsoever with resin shells. They have come a long, long way since the old JNJ (or whoever made them) Cal. Zephyr abomination that scared many if us off the idea of shells.