I just got a Revox B77 mk2 and i'm trying to figure out the whole alignment process. the first problem i've run into is this - the B77 service manual does not show how to adjust the wrap, zenith, or head height of the heads, only the azimuth. each head also has a different number of adjustment screws - the repro head has i believe 5 (two behind, including the azimuth screw, and 3 in front of the head that i have not been brave enough to mess around with), and the record head only has the 2 behind the head. am i missing something here? is the B77 head block constructed in a way that makes adjusting wrap, zenith, etc unnecessary? do i only need to adjust azimuth on this machine? if anyone is familiar enough with this machine to let me know, any help would be greatly appreciated!