The batches of 2:1 epoxy I have mixed less than perfectly seem a bit softer, and takes longer to get to that decreased hardness. Not sure if the adhesion is markedly less when mixed incorrectly, but I suspect it has to be to some degree, and I do not know how tolerant 1:1 epoxy is in terms of improper ratio.
My arctic silver epoxy has not failed anywhere I have used it
I was reluctant to get a digital scale and start measuring my regular epoxy this way, but the precision is so much better than trying to estimate the meniscus, and or how much volume of bubbles got trapped in the resin when pouring the hardener on top.
BTW, my digital scale is good for 300 grams 0.01 resolution and is smaller than my fartsmone. A bit thicker though. Was 13$, making my regrets of not getting one sooner much greater.
Could use 500 gram capacity though on occasion.
