I have created a new 2-stage master model for RCG release 2.4. This model will use C-code and scripts for blend-filter switching that requires the cdsFiltCtrl block in version 2.4. I have replaced the isi2stagemaster block in h2isiitmy.mdl with the isi2stagemaster_2_4 block. The new model is called isi2stagemaster_2_4.mdl in userapps/release/isi/common/models. I built it on h2seib8 in /opt/rtcds/lho/h2/rtbuild-2.4.1. It built successfully, and I'm waiting to test The prepare script will need to be changed to load the blend filters into both the 'CUR' and 'NXT' banks, rather than just the individual banks (this doubles the number of blend filters that must appear in the foton file). It also requires the 'MASTER' switch blend filter script, rather than the regular switch blend filter script. I will move this script from the Stanford directory to the common scripts directory. I will add the screens for the new blend filters from the Stanford screens, as well as the new overview screen. It seems as though there's a 'trunk' building area that uses the current trunk of the RCG. This might be useful for testing the new Guardian alarms.