The invention relates to novel recombinant hemoglobins having reduced nitric oxide scavenging andor increased high soluble expression. Upon operation, the flywheel assembly is released by mechanical backup bearings which then normally remain disengaged until shutdown as the flywheel assembly is levitated by the axial magnetic field. A residual transient error is then obtained from the rotated second current phasor measurement and the first current phasor measurement. Also, a method of installing an underdrain block lateral comprising at least one underdrain block including the steps of attaching a handle to external details on the underdrain block, lifting the underdrain block lateral by the handle, positioning the underdrain block lateral into the underdrain system, and detaching the handle from the external details of the underdrain block. The alcohol carrier is preferably a C1-C4 monohydric alcohol. A forward inclination limit point is defined to limit forward rotation of the reclining plate element.