i am processing Altera Max, there is recoverable gold, , my percentum is one tenth of one percent by weight, Chips crushed, acid wash nitric first, washed, hcl, washed nitiric, / hcl, washed , dried fired, but i am doing 140 oz. for decimel, one four oz. i am using minimum cheap acids, and quick process, to save time. i have kept the slag, but i just don't see more value, the newer programable chips, i even see less value, as gold is used sparingly and only for engineering value purposes, , i don't have a list yet of which chips are of more value, but i will be keeping one, and sharing. , i am in Vancouver Metro area. i have say near a hundred pounds i am processing, i purchased near Chicago area, all costs, 85 to my door. i am doing 486 chips, which are another 200 lbs, which cost me 250 landed, , in all of this, is a labour intensive effort. careful work, and a realization, of not to be to optomistic . , i wish you luck, Thomas in metro Vancouver