BTW Workbench 1.3 works just fine with KS 1.2.
The only reason to get KS 1.3 over 1.2 is to have working AUTOCONFIG(TM). KS 1.2 has is broken due to
a silly bug. As far as I can tell that is about the only change in 1.2 to 1.3. As usual it was marketed as an upgrade.