HI Doc I added another beam parallel to and 12' from the 1 st with 3 more trolleys an have room to move around the cars not having to go over top and leak #&*@@ or what ever decides to come out of whatever is hanging and make it easy to move anywhere in the 12' by 36' area under the trolley Assembly. Something to think about at this stage as it will add a lot of versatility to the work area. Wally