[Mark N.]

For those of you that have the 507, do you really need new batteries every 10-12 months as per their website? How much do those batteries cost? To replace them on my tow vehicle and trailer both every year really adds up over a 10 year period.
Is there any downside to the 510 system? I've determined I don't need the flow through design. My G614 tires just don't get air added to them often enough that it would be any hassle.
Right now, based on battery replacement costs, I'm leaning towards the 510 which will probably only need the $20 replacement sensors done once in my towing lifetime. But, if there's a good reason to go with the 507 instead, I would.