Maybe this idea has been tossed around already but I’ve seen a few standalone systems of pressure plates for weighing corny kegs. Idk much many people use sparks to control the chambers they serve from but it would cool to have a pressure plate you could hook up to the spark to inventory the beer left in the keg. The same could probably be achieved with a digital flow meter which might have more versatility as a spark accessory but the weight might be more accurate and require less continuity for measuring.
Either way it’d be another cool feature for full-(home)brewery integration in brewblox.