If u want to try the ota gb update,use unrevoked forever & kust leave the bootloader unlocked,s-off,then u can still flash back to watevr rom u like,stock or custom.Thats what i did & aftr seein how little the gb update actually did on my Evo i am now,finally,using a custom rom again. Im using MikGs Sense 2.1/3.0 version 2.2,GB 2.3.3 rom,& it runs great,way better than stock Evo 2.3.3, & it has Sense 2.1 & some Sense 3.0 too. Way cooler than stock Evo GB Sense. Just leave s-off & u can always roll back tk another,rooted or unrooted stock roms,or custom roms,whatever u like. Just remember to flash unrevoked forevers s-on zip before returning your Evo to Sprint for warranty or insurance repair/work. Thats what i do so.i can try ota updates then roll back or switch to a custom rom again