I modified the generate_master_screens.py script in /opt/rtcds/caltech/c1/medm/master/ to handle changing the MCL (and MC_L) listings to ALS for the two ETM suspension screens and associated sub-screens.
The relevant added code is:
custom_optic_channels = ['ETMX',
for index in range(len(custom_optic_channels)/2):
if optic == custom_optic_channels[index*2]:
for swap in custom_optic_channels[index*2+1]:
sed_command = start_sed_string + swap + "/" + custom_optic_channels[index*2+1][swap] + middle_sed_string + optic + file
When run, it generates the correctly named C1:SUS-ETMX_ALS channels, and replaces MCL and MC_L with ALS in the matrix screens.