Hey guys I just found a hatsan atp1 pistol refurbished for 280. I was looking at the crossman 1720t but this is half the price. Question is this. If I put a regulator in I know i will lose shots due to the small reservoir but the point is just to get 1 magazine of shots through at a constant pressure. Has anyone done this? The atp1 looks like a shooter but there is no peak Plato just a few shots climbing up in speed then straight down. Each shot reports about 60 psi per shot. Anyways if any of you have regulated the at pistol please let me know. Oh yeah and im planning on using the huma reg from an at44 thanks