In balance can mean one of two things on this type of setup
1 = push rod and shock are mounted both the same distance away from the pivot point of the rocker
2 = the mathematical equation that allows the pushrod and rocker to use all of the shock travel availible ... Leaving no unused area of the shock.
There are so many variables of this
So for example you could mount a shock that is 50% shorter and still do the same job by mounting it half way on the rocker between the pushrod side???
For example if the shock required for upright mounting was 30mm travel.
And its pushrod was mounted 20mm from the pivot on the rocker
Then you could mount a 30mm travel shock on that rocker with the same 20mm offset from the pivot.... Or you could mount a 15mm travel shock by mounting it on the rocker at 10mm from the pivot point
Hth
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