Did anyone fix the iDataLink Maestro RR issue for w4500nex without having to purchase OEM? I purchased an SD card off Ebay (this guy: https://www.ebay.com/itm/133889598926) and it, too, won't work with Maestro RR. It sucks not having steering wheel controls but it also causes phantom draining and killing my battery. It took me a while to figure out and 3 Costco warrantied batteries. If I pull the fuses on the radio, no more dead batteries. The Ebay firmware did fix the boot loop but I guess it is not fully compatible with the w4500nex -- likely just the modified w4400 firmware as outlined here