Using epoxy is not my 'preferred' option, just one of my available options. I have reservations about epoxy concerning longevity, I have known it to 'unstick' in applications other than boats.
Mind you, I think that some of that may well be down to unequal quantities of hardener & adhesive and insufficient mixing.
We do all tend to judge the 50/50 proportions by eye, a notoriously inaccurate method, however few of us have scales accurate enough to do it by weight.
Of course when we are mixing resin or filler it is even more difficult to be accurate in small quantities. A pea of hardener to a golf ball of filler is only a good guide if you are mixing that much, if you only want a pea of filler it's a bit harder.
As others have said, slow cure epoxies do seem to be stronger than the rapid ones. I do wonder whether that could partially be down to us sub-concsiously rushing the mixing with rapid as we worry about it 'going off' before we assemble everything. Just maybe.
It's certainly a more complex subject than some would imagine. Thank you to everyone for your comments.
