Tbh I'm not sure how it calculates the score, seems kinda random sometimes. It's interesting because I did it in my second or third try today, without even hoping to break the 140 mark, but bam, there it was. After that I tried breaking it under pressure, but that resulted in some lapses in concentration and whatnot. At times I felt I was going to break it, but the score would still come significantly lower (133, 126, 114, 130, 124)... decided to take a break since my fingers were starting to get stiff. I've hit the magical 130+ five times though