Hammer scrapped the whole HART core technology. There were just too many people that drilled them wrong. If the driller put the HART in a conventional Mass Bias position the ball would be a complete dud. Which is a shame because Hammer did everything they could to make sure that people followed the directions. A big stop sign on top of the box with instructions. An additional flyer in the box explaining how to drill it. And the recommended drill sheet. I don't know what more they could have done. I have only seen about 5 Hart technology balls being used in my area and 3 or them were drilled wrong and one of the correct ones was mine.
It is not recommended to be drilled for a left hander. I have heard that was just a marketing ploy but I don't think so. The HART technology balls are pretty much just a pro-cg ball like those sold on Bowlingball dot com. The Hazard, No Mercy, Beatn, and Whupn would get you a ball with the cg way left of the pin and mb if you drew a line from the pin to the actual mass bias.
This type of pin , cg, mb combo doesn't lend well to drilling for a lefty.
The actual mb on these balls is 6 3/4 to the right from the HART on a perpendicular.
If you need more info go ahead and message me.
