I just completed an inground pool build. The pool builder saw I have a Nautilus CC Plus robotic cleaner sitting on the deck. He said to never put it in the pool cause it has a higher potential for tearing the liner compared to the Polaris 280 that the build came with. What are the experts thoughts on this? I have had the Nautilus for an above ground liner pool and loved the machine so would hate to see it just sit in the deck box all year.