I dont have pcb yet. But my previous forward smps (diferent topology) was able to supply 50A. Biggest problem was efficiency. It was around 80-85% at full load. PCB was not any hot. I used a lot of tin. Hottest parts were snubbers (primary/secondary) and diodes on secondary.And the circuitboard that can handle 50A? I looked at making one recently and prices from a Chinese supplier in quantities of 1000 were in the range of $15 each.
I will do some test with thermal camera and wattmeters, when project will be completed.