I have before set up a porty on one side of the tree, and the ratcheting bollard on the other side when I might need to use two rigging lines. Although I see some use for the Stein double, I would prefer the flexibility of using a porty for one of the lowering devices, if for no other reason than the mobility of it. Once you mount the Stein, it's mounted, unless you loosen and move it. Like I said before, for Reg's style of using tandem lines together, it's perfect. For the usual rigging scenario, it's not necessary. It all depends on the job at hand, but I see little use for the Stein myself. Now that I have a GRCS, I see even less use for it, and that's coming from a guy who's only used his GRCS on one job. Greg Good told me he encourages guys to mount it any time there's rigging to be done, but I can't justify the time of setup on most of my jobs. I have one take down and one trim lined up where I will use it. Other than that, it stays in the shop. I keep old Red in the truck for the occasional heavy lowering job.