Ya, centering mine has always required a test drive and then while on the road, use a wrench and small hammer to "tap over" the mount on the tie rod. We are talking about 1/8" adjustments. Very easy, and requires no special tools and nothing requiring much muscle.
And, maybe I am just being conservative, but the very few times I have ever had to take a coach (all DP's) in for an alignment, I just remove the two bolts holding the Safe-T-Plus on and reinstall it after the alignment. Were I to know the tech well or be in the pit with him, I probably wouldn't feel that would be necessary.