Coming from GS3...Easiest way to avoid KNOX trip with ROM and KErnel flashing?

Just got my GS5 today. Rooted it using this method with towel root and a kernel downgrade

http://forum.xda-developers.com/tmob...x-0x0-t2909352

SuperSU is stuck on 'disabling knox'

I am wondering what is a way to avoid setting the timer when generally when updating ROMS and Kernels since...from what I understand, I can't have TWRP without tripping nox