height adjustment mechanism 78 which is a control subassembly for the height adjustable blade 13 blade 13 rests atop a t bar having a drive 17 a that automatically raises and lowers the blade 13 to a desired height tables 1 and 2 show blade angle and height settings for a paper grade with machine direction fiber alignment and a grade with cross machine direction fiber alignment the tables show a variety of angle adjustable and height adjustable blades which may be utilized in the respective regions of the wet end of the fourdrinier to achieve synergistic results it should be noted that in this instance seven blades are shown in each section with the abbreviations u201c h u201d or u201c a u201d indicating that the blade is either height or angle adjustable respectively moreover the gravity units 1 3 correspond to the hydrofoil sections and are three hydroline elements low vacuum units 1 3 correspond to varioline elements low vacuum units 4 5 correspond to vaculine elements it is to be understood that the invention is not limited to the exact construction illustrated and described above but that various changes and modifications may be made without departing from the spirit and the scope of the invention as defined in the following claims.