Carl.
That works on your set up. But there are important differences between your set up & post #1. Notice the 'angle' on your set up with valve closed. The angle: the angle from a line drawn upwards through the shaft centre & intersecting a line drawn from the valve tip [ contact point of the roller] & the shaft centre. Notice it is greater than 90*; & substantially greater than 90* & that is with a 1/4" spacer. With no spacer [ as installed configuration ], the angle would be even greater.
Now look at post #1. The angle with valve closed is just over 90*; the rocker needs to go down so that [a] the roller tip is better centered & the rocker starts off at a better angle for the start of the lift cycle. Fitting a 1/4" spacer under the shaft might centre up the roller/tip better, but now rocker will be at an extreme angle at max lift; valve lift will be lost also because of the arc it has to swing through. Prod interference is also possible, as I alluded to, earlier in this thread.