Our 507's (non-flow thru) arrived last week and will install on our rig wheels before a trip to the Mid-West from Reno in early May.
Side note; friends of ours installed their 507 flow thru's on their wheels couple weeks ago and on startup they showed one tire with low pressure and leaking. Checked pressure manually and it confirmed. Swapped sensors after putting more air in and readings were fine. Turned out the original sensor was pinching the stem and causing the leak. Sensor was fine...operator error.
Nice before heading out to know what your tire pressures are...besides the monitoring on the road.