In the days of long axle to axle compounds, we measured brace height and tiller differences, just as did the recurve archers. The main difference being the compounds set tiller equal.
When parallel limbs became the norm, tiller was not so easy to check in the standard way and we used diagonal distance from one limb pocket to the opposite limb axle, to check the bow was symmetrical as regards the riser and limbs.
Today I was looking at a bow that looked fine but one tiller distance using the recurve method was about 1/2" different from the other.
The limbs were both fully wound down and the timing was good. Do some newer bows make longer limbs for the bottom( or top) which might explain the tiller oddity.
When parallel limbs became the norm, tiller was not so easy to check in the standard way and we used diagonal distance from one limb pocket to the opposite limb axle, to check the bow was symmetrical as regards the riser and limbs.
Today I was looking at a bow that looked fine but one tiller distance using the recurve method was about 1/2" different from the other.
The limbs were both fully wound down and the timing was good. Do some newer bows make longer limbs for the bottom( or top) which might explain the tiller oddity.