I have a 5’x5′ build, 48″ x 48″ cutting envelope with rail supports. I am using all the updated 525 parts, printed by me. Running with mach3 r1.83.027 using breakout board and haoyu tb6600 drivers and 42BYGHW811 steppers 67oz-in (2.5a per phase at 3.1v). I’m running them at 1.14a in parallel with 13.8v supply. Some pictures attached to describe other information.