If your plates ever touch during a press you are doing something wrong. All the pressure is on the puck itself since that's the only thing touching the plates. So you need to account for the end squish puck size to determine how much pressure you actually applied during the extraction. You have two points that overlap. First, when it's a bigger and harder pressed puck, it's harder to get the resin to start flowing through it. So you have to press harder and longer. So We don't pre-press, we use bottle-tech. Or gift tech. The verticla filter style NugSmasher shows on their youtube. Click to play YouTube Video SO this also factors in why you get more with smaller amounts, because it's less to push the resin out of but this is diminision returns. It's a very small amount you'd gain pushing 448 1 gram presses vs 16 or 32 larger ones. And also, yes, calculators suck when doing small amounts.. which doesn't help making proper strain adjustments. It's better to hit 10g-14g at a time in my exp.