My drivers door has a bit of sag to it when open and Year One finally shipped me the pin and bushing kit. The FSM is light on details so is it possible to replace the pins & bushings w/o removing the doors? What I'm thinking of doing is using my floor jack to support the end of the open door while replacing the pin & bushings on each hinge one at a time. Is it as simple as tapping each of the existing pins from the bottom until they pop out from the top?