for heavy oil: something dull with a shorter pin distance.
med heavy: you can have a little longer pin dist than pure heavy.
med. A solid reactive with pin around 4"
med. A pearl reactive with a go-long-and-kick layout.
med light. a weak reactive with a weaker pin, maybe about 6".
light/spares A really weak polished reactive or a plastic ball.
Not the greatest layouts, but your driller should be able to get you the reaction your want.
--------------------
I like my coffee black, just like my metal.
