I finished 2 ounces of my grey shetland yesterday. I'm glad I dug out my old food scale. It is goes up to about 4 pounds or so, and is meant for measuring foods for canning and such. It does have ounce markings and can be reset to zero when I put the bowl on it scale. The bowl has a wide mouth, so can easily contain the big bag of roving.
I discovered that my 2 pound bag of grey shetland was actually only 1 pound, 12 ounces. I will probably try to also spin at least one bobbin of the black. I also have to decide if I want to take my Traditional to spin guild tomorrow, since that way I can continue with the same bobbins. Or rather, I have to see if it will fit in the back seat. I don't like to lay it over and not sure if it will slip inside otherwise.
But the Tour is off to a great start. I better find out when the final date is.