David,
It's the Oneway Easy Core system.
If I was you, I would hold off on a coring system till you get a little more bowl turning experience under your belt, and decide if you like doing them?
Meantime, rough your green (wet) bowls out. Leave them on the thicker side. You can check them with a MC meter if you have one to find out where you are starting from? Weigh them, and wrap them in brown paper. This will help slow the drying down. Then put the paper wrapped bowls somewhere to dry. Check them in a month. Reweigh them and record the weight. I write it on the bottom of the bowl where it will later be turned off. Then put them back to continue drying. There is no rushing the process. Finally when they stop losing weight (roughly 10-12%MC) you can try finish turning. Be prepared to find some checking or cracks. It's sort of inevitable. You can fill the cracks with CA and wood dust.
I have a bunch of rough turned bowls drying in the rafters of my tractor shed. One of these days I'll pull them down and finish them. Right now I have a bunch that are completed. They are to the point of piling up in my shop.
Bowl turning sure generates the saw dust and shavings! That's sort of the reason I got the coring system.
Have fun!
Dave
Cardboard template for roughing out on bandsaw (below)
Bandsawed blank (below)