Thanks all so far. OK, so it's suppose to look like this. I am wondering how you measure out a chunk of rock 7g in weight exactly. I guess I'll mix and match and put together as best I can, then adjust all other weights to match. I is an engineer and can do simple math.

I have printed out the unblinking eye article and will take many precautions for my safety. I have heard this is nasty stuff in dry form.

tim in san jose