When I run my projectors in DMX mode, the scan angle is substantially bigger than the FB3 supports, even with the sizes maxed out. Further, there is remarkably little vertical / horizontal play - if I try to move a projection zone down or up it just ends up being squashed. This happens on two projectors made by different companies. My engineer's attempts to adjust the scanners using the internal pots make a small difference, but not much. Is this expected behaviour? I have DT-30 scanners in my projectors, if that makes a difference.