Morning Matt,
Have one set in dcc ready another came with sound and really love these. I did find when I operated the sound a/b set the sound was super but for some reasone the b unit did'nt roll along , after inspection I found the wipers were missing . Inspected the dcc ready set it was the same thing,no wipers for pickup. Contacted Bowser and within days they sent me wipers for both b units , both are unpowered. In my humble opinion you won't be disappointed.
john