Sorry Rod,
but yu got it the wrong way.
When you add droop, the number on the gauge gets smaller (arm closer to the table).
For example: You got 5 mm droop, that means you arms are 5mm above your chassis level when the shocks are off and the car is supported (droop blocks)
Now, you want your arms go 2 mm further down (more droop) they will be only 3mm above your chassis level..
Hard to explain, but that's how it works.
Aren't you running XXX-S by the way?