Rom Toolbox Setting (LCD Density) not "taking" - Acts like I never changed it? topic

I'm running AOKP on my VS980 (Verizon LG G2) Kit Kat 4.4.2 and I've tried to change ro.sf.lcd_density to 340 using rom toolbox and the phone reboots and comes up exactly the same with the setting still at 480 instead of the 340 I set it to...

Anyone know why this won't take?