Even 10% moisture is too much. Bake the blanks before you stabilise them, cool them in the oven, store in a ziplock if not doing them right away. The moisture will boil out and force the CJ back out when curing if not removed.
Looks very good. Keep it in a controlled climate as the wedgie segment style bottoms have been known to split over time. American Association of Woodturners have a Segmentation section you might be interested in looking in on to get more ideas...
Works with any camera, ipad included. Just needs a sheet of polarizing material over the light source and one held over the camera lens rotated till the reflections fade out. Hard part is finding the polarizing material.
Darn good finish! If you really want to get rid of the reflections research the use of crossed polarizers for photographic lighting. Should give the bright colors of the first shot without the bright reflections.
The material you are drilling into has a big effect too. Hard stock like some exotic woods and plastics will stay a bit loose and the same bit drilling a soft wood can be too tight from the fibers relaxing into the hole.
Looks like from the picture it has straight sided jaws with no knurls or ribs to grip with. That and tommy bars are not the greatest for applying pressure to the jaws. If you are intent on doing bowls in the future do some research on quality chucks. I have nova chucks with dovetail jaws and...
I think you might have the ring on backwards. The big inner diameter if I remember right hangs over to cover the lower barrel. Thats why the instructions dont make sense, you should be turning to the tube for the narrow part of the trim ring