Bob make sure you mark what handle under the motor is for the used waste water tank and which one is for the contents of the loo . A few years ago . I hired a large one took my parents and us up to Scotland . Jnr kept going to the loo as we travelled for fun . But left the taps on . Before we started I asked the firm which handle under it was for what and he pointed them out. By the time I stopped the 1st night in Moffat the water tank was dry due to Jnr leaving the tap on . So its fill up and off , stopped in a large car park near a well known loch and over the top of a sink to empty the waste water tank . Got under the motor and pulled the handle ( the one he said was for the waste water ) WHOOSH covered in Sh*t . The dick head had told me the wrong one . I pulled the other one to let the waste water out and try to get it to send the human waste towards the sinks , but no luck just more mess so to say ( he said that both tanks had been emptied MY ARSE THEY HAD . jumped into motor and off . I stank and had to stop and get washed and changed best I could . Well they say S for luck . Going over Rannoch moor an old wagon hit the drivers side and took it off . Very lucky as Jnr was sitting with pillows behind her . I stopped jumped out and started to run after the wagon . It was a Glaswegian taking a firms motor back for a friend and no insurance . Almost a fight but he backed off with his pals . Police arrived and ambulance . Told off police never to park on the moor and leave a car etc you return to find no car just bits left . Everyone put in ambulance . I had to drive the damaged motor to Fort William with no side on and the huge wagons carrying trees just shot past knocking bits of the trim off as they flapped about . They say S for luck still waiting .