7 Stone cluster

Hi everyone. I am having a bit of trouble finding out which is the
best way to make a 7 stone cluster.

the centre is a buegette that needs to be set in a tappered tube
with four claws. from there, there are two, and then one diamond
making a triangle shape on either side (im sure you all know the ring
i am talking about) please could someone let me know the best way to
put this together, and where is the best place to position the claws.

thanks a lot
Andrew
South Africa