Is it standard practice to use a 'disk' as the bottom of segmented turnings? I see two concerns, 1) is the end grain/side grain problem as the bowl is being turned or sanded and 2) the look of not having the bottom "ring" the same as the rest. Granted, inside the bowl there is a nice look at the bottom rather then the points coming together but the outside look doesn't thrill me. To combat this I built a bottom ring to cover the 'disk'. Then the question would be, does Segment PRO have a way to build the bottom 'layer' as a ring rather then a 'disk' ? Seems like the default is always a 'disk'.