My ride wasn't an add on, but it was the easiest I've had to date. Was worried, but when you know the stuff in the PTS, it really isn't all that hard I guess.
If it is an add on, you don't even need to use a complex plane, do you?
Go through the PTS for the add on. If you already done multi, it should be easy to do it with just one set of levers/knobs.