Not trying to tell anyone how to maintain their bike here. (more than one way to skin a cat) When I do my fork oil every 10,000 miles, I leave both forks connected to the lower fork stem and remove as a complete unit. I do not remove any plastic. I accomplish draining and servicing left and right fork at the same time without have to adjust anything when I reassemble. I also inspect and service the neck bearings at the same time (tapered roller bearings).