The long camera will allow up to about 500 fibres on the chip, and will give twice the spectral resolution of the current camera. Make sure to run the program plenty in advance of your run. The user manual . The source code . Astrometry of bright sources from photographic plates will have lower accuracy.
Brighter objects are also liable to display proper motions.
Do not underestimate how long it will take to produce the configuration files . Start producing them as soon as possible. I would like all configurations available before the run so we can test them in the AF2 micro in advance. There should be some fiducial stars in the centre of the field, and some at the edge. Otherwise your setup will likely be rejected by the AF2 system computer.