Hi,
- hard to have adjustable switches inside an actuator. Maybe little easy on other variants
They don't have to be on the actuator, in fact put them on THE GATE.
If one gate needs to close before the other to ensure they close properly, then you use an extra switch on the later closing gate.
As the gate closes, when it gets to the earlier switch if the other gate has not closed then it stops the later gate until the earlier has closed.
An absolute encoder would be ideal for your purposes, but as you say, physically not possible.
Tom.. 