KO Count: Late Surrender Expectancy

I understand that if I play a 6D game with DA2, DAS, S17, 75% penetration, and a betting ramp of 6 then my expectancy becomes .73% using the KO Preferred system. But can somebody please tell me what the NEW expectancy would be if Late Surrender was offered? Somebody please run a SIM and let me know.

I don't think I can simply add .06% for Late Surrender to .73% for a new expectancy of .79% can I????

Thanks in advance!

-MJ