Z probe and tool setter combo

Hello everybody!

The 3-axis machine I'm trying to retrofit has a tool setter button fixed on the bed, as well as a spindle Z probe, and I'm trying to make it work (using qtdragon, if that matters). I don't know the length of the probe, and I don't want to use a fixed value for it due to the possible spindle clamping variations, so I'd like to measure it against the tool setter before every probing routine.

In order to do that, I need to move the probe down until BOTH the probe and the tool setter contacts are closed, to compensate for the probe's action distance. In other situations - probing the stock or setting the end mill length - I need the machine to go until EITHER of the contacts is closed.

The issue is, there are no separate HAL pins to feed the tool setter and the probe signals into, just motion.probe-input. I can combine the signals with or2/and2 and it works for one of the scenarios, but obviously not for the other.

How do you folks solve that? I can't imagine I'm the first one with this question, but digging the forums did not produce anything helpful for me.

Thanks in advance!