One more thing dude you might already know this, but if your referring to that rubber hose that connects to the fuel rail you might want to reconsider. The adjustable fpr needs to be after the injectors, so you will be tapping into the end(towards front of car) of the fuel rail remove the schrader valve and purchase the proper a/n fitting to attach the return line.

Maybe i just misread but better safe then sorry. BTW, thanks for actually going out there and getting your hands dirty rather than wait for someone else to try and fix this ongoing lean issue. In other words the more we duplicate and check each others work the better we will ensure reliable results. Scientific method.