An arrangement for a carding machine for parallel arrangement of fibers, includes a carding track; a plurality of flat bars arranged for being guided along the carding track; clothing positioned respectively on each flat bar, the clothing including clothing structure that engages in the fibers; and a mechanism for releaseably fastening the clothing to each flat bar. The stack, partially wrapped within the wrapping foil, is introduced between a pair of belt conveyors. On startup, the router creates a list of available client applications, the client versions and types, and versions of input data the clients can handle. This interchange point is a synchronous speed interchange point, such that the torque-transmitting mechanisms are engaged and disengaged without slipping forces being transmitted. In some embodiments, reaction between the group V precursor and the substrate is reduced by starting with a low molar ratio of group V precursor to group III precursor, then increasing the ratio during growth of the first layer, or by using nitrogen as an ambient gas.