There is no startup switching of screen mode in KS 1.3, one needs 3.1; the A1084 monitor is flexible enough to handle NTSC and PAL. PAL give more scan lines and hence, more screen space. For a VGA monitor I would recommend an Indivision ECS flicker-fixer; for HDMI monitors/TVs I would use an Amiga RGB to SCART cable with an SCART to HDMI converter.
Sorry if this is of no help.
