I'm not GPowers, but if you are looking for the dividers he used, I believe they are the Tanos and they are sold by Woodcraft. There are two sizes - 70mm and 120mm high. I think he is using the 120mm high ones.
Also, here is a previous post from Greg on the dividers.
Mike A.
Also, here is a previous post from Greg on the dividers.
Mike A.