T' launch theme was clusters, and I started off with t' Callisto on 3 x 1/2A3-4T with Q2G2 igniters. I'd wanted t' go 3 x A but discovered I didn't seem t' have three matchin' 13 mm A motors. Never mind, it flew fine on 1/2A. Aye aye! T' wind had shifted since they set up t' field, so t' Callisto blew over t' flight line and came down on someone's popup. Avast! Nothin' damaged though.