: The digital scale is a good way to go, but keep an eye on density differences
: between the resin and hardener. When the mfr. says 2:1 by volume, they
: mean it. For example, System 3 resin weighs 9.14 lb/gal, but Hardeners
: 1,2&3 weigh 8.17, 8.12 & 7.91 respectively. Per 100 parts of resin,
: you would use 50 parts by volume, but only 43 parts by weight.

I use Raka. The density seems to be pretty close. I have not mixed a bad batch yet with one exception which I (on hind sight) may have mixed 1 to 1 by mistake -- my fault, of course.