I just stumbled upon a method of getting the right proportion of Resin to Hardener that is unbeleivably simple. (Forgive me if this is redundant). I was stumbling around tryng to find all my grauated scales, and information sheets when I thought of this:

West 105 Resin and 205 Fast Hardener. Ratio 5:1 weight and volume
(207 hardener which more of us use is 3:1 volume 3.5:1 weight)
I have a small digital postal scale, 1/10ths of an ounce.
I first place an empty plastic cup on a paper plate on the scale then turn it on. It resets itself to Zero (ignoring the weight of the cup and the plate)
Next I fill a pour a little resin into the cup. 2.5 ounces (weight)
Then all I have to do is pour in .5 ounces of 205 Fast Hardener bringing the scale up to 3.0 ounces.
Done!
I haven't wasted any hardener that won't pour out of the hardner cup, I don't need to worry about the menicus and I haven't gummed up three-four plastic cups.
for 3.5 to 1 ratio, just hit a multiple of 7. 7 ounces resin, 2 ounces hardener (look for 9 ounces ont he scale)
2.8 ounces .8 ounces of hardener. look for 3.6 etc....

Will