Various embodiments of the present invention provide both apparatus and method for the patterning of cells onto non-adhesive substrates and the controlled regulation of cells through the use of photoactivated cellular morphogenic factors. The system includes an order execution process that receives orders and matches orders against quotes posted in the system on a time priority basis and an order match-off process that checks if a market participant identification associated with a received order matches a market participant identification representing a quote in the system that is at the best bid or best offer price in the system. A thruster can be used to maintain weight on the mill during the milling. The crib liner may be attached to the crib by at least one fastener. The extruded profile can be used for different lighting tasks.