Precision fluid head transport

A method of forming a fluid treatment apparatus, said method comprising the following steps:

• providing a first sheet of material, said first sheet having an upper surface, lower surface, and two side surfaces interconnecting said upper surface to said lower surface;
• forming a plurality of spaced apart drive rod member receiving passages extending through said first sheet from one of said side surfaces to the other of said side surfaces and through said upper surface of said first sheet such that an inside surface of each of said drive rod member receiving passages is continuous with said upper surface of said first sheet and provides a bearing surface for a drive rod member inserted therein;
• forming at least one fluid injection passage and at least one fluid drain passage through said first sheet of material from said upper surface to said lower surface between said drive rod member receiving passages;
• inserting a drive rod member into each of said drive rod member receiving passages such that said drive rod members are rotatably supported by said bearing surfaces and at least partially extend above said upper surface;
• providing a second sheet of material, said second sheet having an upper surface, lower surface, and two side surfaces interconnecting said upper surface to said lower surface;
• forming a plurality of spaced apart drive rod member receiving passages extending through said second sheet from one of said side surfaces to the other of said side surfaces and through said lower surface of said second sheet such that an inside surface of each of said drive rod member receiving passages is continuous with said lower surface of said second sheet and provides a bearing surface for a drive rod member inserted therein;
• forming at least one fluid injection passage and at least one fluid drain passage through said second sheet of material from said upper surface to said lower surface between said drive rod member receiving passages;
• inserting a drive rod member into each of said drive rod member receiving passages such that said drive rod members are rotatably supported by said bearing surfaces and at least partially extend below said lower surface;
• and
• arranging said second sheet over said first sheet, such that said drive rod members of said first sheet and said second sheet face each other.