Hi guy,
d3500ram : Thanks :-)
billtex : Thanks for the link, I hadn't seen the entries in that mod contest. I like the fact that your mod uses available parts that could then be disassembled or reconfigured / reused differently later. It also means that if you camped somewhere that you could not get the vehicle to a dumpstation - i.e. grey water had to be carried or wheeled to a dump station, this gives you a solution for that too.
Yeti plus : I could tell them it was an inspection hole and ask them if they could put their eye to it while I tipped some used dish washing water down the sink :-).
Cheers,
Steve.