A three-dimensional digital model of a vehicle foot well is used to mold a vehicle floor tray such that large areas of at least two upstanding walls of the tray depart from respective surfaces of the foot well by no more than an eighth of an inch. The asymmetry may be between a pair of opposed outwardly open annular channels inboard of a bearing surface of the journal. In embodiments, the scalable messaging system may include messaging system instances at different locations.