My little old Shadow Cruiser doesn't have a bathroom; it doesn't even have a grey tank. What it does have is an old cut-down bicycle inner tube that dangles down from the camper wing below the sink...
Very cool. I did similar using a blue boy that was featured in TCM last month. This gave us 15 (US) gals extra of waste capacity for our last camper. This setup could be transferred to any TC. Take a look at #8; Mod Bill
