Over the last year or so, I've modified the Macerator plumbing and the hose connections. I always use the Macerator, no need for the “downward dog” 4” connection.
The grey tank can be left open to drain.
With the addition of a valve at the end of the pipe near the wheel well, there is no discharge when quick disconnect is opened. I use a plug while traveling.
Quick disconnects for all connections allows easy use. The hose and fittings are stowed in their old compartment. I do have a second 1 ½ flex hose to extend reach.
Incorporating a standard Campco drain assy. Gives me all the choices the standard stinky slinky has.