Of course, S'up to you, but when our step covers wore out we didn't replace them and now don't miss them at all. The steps have a gritty surface like sandpaper, but the covers seem like a waste for us.
The TMPS is likely the best peace-of-mind mod we have done, but the most useful, day-to-day is replacing the unreachable ceiling vent with a Maxx-air remote controlled unit. The venting, in and out, is important and the remote is wonderful.
Welcome to the world of the 5th wheel. I haven't towed a TT for a lot of years, but there was a long period in between, so backing didn't seem to be a problem, but I go really slowly when backing.
Happy Camping!!
