A fitting method is provided for a multichannel hearing aid with at least one low frequency channel having an individually adjustable compressor. The blade includes a leading edge cooling supply cavity and a trailing edge cooling supply cavity to supply pressurized cooling air from an external source to the internal cooling circuit of the blade. The associated IPSC broadcasts the IP addresses of the associated customer networks to other IPSCs, and each CE sends to an associated IPSC, a list of received loop-back addresses. Adjacent pipeline stages are capable of storing distinct data items without spacers. In an alternative process, a thin gate oxide may be grown prior to a polysilicon layer deposition, and oxygen is then implanted through the polysilicon according to a patterned photoresist mask. The venous valve can also be formed from biological tissue from an autologous, heterologous, or other tissue source and implanted interpositionally at the site of valvular incompetancy.