Ride Height "Sensors"

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here is my problem/question...

I chose manual paddle valves for my air bags, for a cheaper setup, and ive been wondering how I will be adjusting to ride height everytime I air up. Obviously there are some expensive ride height sensors, but i was thinking something cheaper.

My plan is too fabricate something similar to the ride height sensors in which a "normally off" brake switch will be engaged near each bag, once my ride height has been reached (predetermined on flat ground and measured), and then a small indicator light by my gauges will be triggered and let me know im "at ride height" for that particular corner. I will still be inflating myself but i will just have a sort of guide let me know when my truck has reacehed the actual height i have chosen, regardless of psi..

Has anyone ever done something like this, or are there any suggestions as to what im trying to achieve. I just dont want to be cruisin down the street "uneven"