Tube and Ribbon building is a lot different than block building. Tubes have other aspects such as twist, alternating sizes and shapes, but why are they so hard to mess around with after you finish drawing the tube/ribbon? Being able to alternate the different manipulation points as shapes will help problems with tube clipping, twisting, placement, and much more, and give players more ways to utilize tube and be able to not have to start over after spotting a mistake and fearing that part they edited is off-grid or unaligned