Does this prove David Vizard's 128 lsa formula ?

The way I see to use it, pick a cam like you normally would and then translate it to his formula, Say a 2.02 360 9:1 and gonna use a 340 cam, the formula says about a 106* lsa, so every 1* degree tighter is 2* less duration, so 114 to 106 = 8* so 16 less degrees of duration so 252/256 on 106 instead of 268/272 on 114.