I need to make sample trays for injection molding and I'm missing a key to the puzzle.

I've talked to my VAR, but they can't solve that .

I'm making five different trays. The trays are made from 1/2 inch thick Delrin and will have 64 machined pockets that are .375 deep. the different trays will hold different sized parts. I was hoping to make one tray and use it as a template.

May problem is that I can't lock the Sketch Text Entity into the center of the pocket.

Any ideas?

Attacked is a current design. SolidWorks 2015

Thank You for your time