Root looking for odin flashable CWM or TWRP



my attempts to root my relay have failed because the cwm everyone seem to point towards is unable to flash anything else (not superSU, not twrp), every time i try i get signature verification failure. the cwm i have does not allow for signature disable, so i'm trying to see if there's another cwm or twrp i can use, but only using odin or heimdall.

i'm assuming i can't use just any odin flashable image i can find of those, but they need to tailored only for the relay, right?