OK, as discussed with Albert, the old 1.7 behavior has been added to fixes_scratch under the "scratch" control and works exactly as before (tested with the 1.7 SCS.3d mapping & script.) The new behavior is now under "scratch2" and "scratch2_enable" controls, which take precedence over the "scratch" control if they were both to be activated. (In the future, we can just remove the old "scratch", rename "scratch2" to "scratch" and search & replace in mappings and scripts.)
OK, as discussed with Albert, the old 1.7 behavior has been added to fixes_scratch under the "scratch" control and works exactly as before (tested with the 1.7 SCS.3d mapping & script.) The new behavior is now under "scratch2" and "scratch2_enable" controls, which take precedence over the "scratch" control if they were both to be activated. (In the future, we can just remove the old "scratch", rename "scratch2" to "scratch" and search & replace in mappings and scripts.)