Why is your avatar two Oscars?I am. Full disclosure it's not super easy to adjust... but I figured I won't adjust *often*
They are about 8" off the water line, similar to the regular mount for xr15s. If I need to raise height I can adjust legs along back of tank stand. TV mounts swing and swivel, the hard part is for both to "twin"... and move in unison. But it's not terribly hard to move and adjust one, then the other.