Originally Posted by
SFO777
Another alternative to re-enter airside is to just the stay in TBIT and use the little known security checkpoint between TBIT and T4. There is rarely anyone in line. Although there is no formal PreCheck, PreCheck Lite is available. You can find it by using the right customs exit and then another right after you exit the baggage drop area.
Personally, I always walk to T4 because it has true Pre-Check and I do not like to remove my laptop or liquids. Especially if one has to walk to T4 anyway, why not clear security there for true Pre-Check?