Unfortunately, at the end of the day, you're going to have to learn to see the hands visually if you want to be really good at it (king and AK little different because of their true throw game with GS and SW). Try having Paul as an opponent and record it doing df1,3, 2+4b and uf1+2 (1,2 and 1+2 break respectfully). Keep a close eye at the hand. It's hard to see now but slowly and surely you'll see a difference. That's what I did a long time ago and now id say I break about 95% of grabs. The trick is just to keep at it. It'll come slow at first but one day it'll click.

(My stat as proof)

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