The IronKiss 50 pounder is indeed an awesome hammer! It was an absolute pleasure to run, exceptional control with alot of BaM behind it as it was with the bigger (90 pound?) hammer last year. Keep in mind also that those are flat dies, with drawing dies or even combo dies it would do that twice as fast. One thing that wasn't in the video was the stroke adjustment, which really allows for lighter planishing heats.
Even if you need to buy a compressor, this hammer will out hit any LG in the same size range, with double the control and a good bit more stroke. I worked it HaRD too, did not lightfoot the treadle, It is a very sturdy machine. The utility style action was nice. it cycled like a self contained hammer, but would single blow effortlessly light or hard, and the clamp feature was handy too.