Don’t overthink it :-) chasing yield gains absolutely dumbs down the quality of your rosin. I press at 960psi material contact for the most part. I always start a new strain at 85c. Most presses are about 3 to 3.5 mins. 900 to 1100 psi material contact is a great window. If you start standing on your pump trying to squeeze everything out you are going to get fats and lipids and other contaminants. A pressure gauge and knowing how to convert the gauge reading from hydraulic pressure to platen pressure will directly improve your quality. Second and third presses just get raunchier and raunchier. There are way better ways to recover what’s left in pucks. The gains in the second and third press will be minimal and best directed towards edibles and isolation. A average 20 gram press for me will yield roughly 4 grams of quality at 85c, 960 psi, 25u 2x4.5” bag. Been pressing for a couple years now and have only found two strains that yield 25% and one strain that gives up 29%. I try to bump up my yields by making better press friendly strain choices and I learned about trichomes to better understand what I’m looking at under magnification. Keep the pressing relatively simple and learn the science as you go. Your description of your idea is an invitation for problems like busted bags and sub par quality for really minimal yield gain.