n3tjm,
Right you are!!!
Top centering ring is the standard type, located flush at the top end of the motor mount tube.
Rings shown in the picture are glued together and placed 2 1/4" down from the top of the mmt.
Motor is canted after all, and angled toward the spin fin.
I guess if I actually built some of these kits I own I would know these things. :kill: