Quite likely won't be implemented, but might be necessary, depending on how AuxTel operation plans go. Currently the plan is to only disperse along the vertical, and use either one or both orders depending on the seeing. However, should we decide to disperse along the paralactic angle (which has advantages wrt the dispersion relation and bending of the spectrum, but disadvantages of splitting the spectrum over many more amps) then we will need to make this extension.