I've never trusted twin pump epoxy dispensing systems. There are just too many ways for it to not work properly. Proportioning by weight is the only way to go for me. That way I know exactly what I'm getting, and never have problems. Pelouze makes a scale that's accurate down in the 1 gram range, for something like 80 bucks at Staples and similar places. I have an older one with a two gram resolution, and it's worked just fine for 10 years...
Mark Langford, Huntsville, Alabama N56ML "at" hiwaay.net see KR2S project at http://home.hiwaay.net/~langford
