Re: new trick for removing head hoses!
Late this past season I removed quite a bit of the longish snake of white flexi pipe from inside and under cabinets and such, and replaced it with PVC. It's a much shorter direct run on the toilet to tank intake now. My thinking was twofold, the PVC is much less permeable, and the short run (maybe 18" vs 5 feet) allows me to use much less water when flushing to clear the pipes well. With only a 15 gal holding tank, this is advantageous to me. On the pumpout side, there is now no low point of flexi pipe to accumulate sewage. I hope/trust that the PVC will remain non-stinky at that low point for years to come.
Did you put sections of hose on each end to allow for flexing?