It's been 5 years with the ARC Pro. I stuck with Scalextric for a long time hoping to hear at some point the USB port protocol would be released. This is now affecting how I help local school systems work out keeping tracks running properly. With Bluetooth there is much confusion in a multi track room gettin the app connected, Let alone connected to the proper/ of three respective track layouts. Each track with its own ARC Pro power base, for physicalr science, repair or general usage. I've said this before and again will say it would be a big benefit to your customers if the USB port could be used to connect and run races. It would be equally beneficial if the protocol was published so programmers could write software for Windows, Linux or MacOS as well as tablet and mobile devices. Where is the USB port information and protocol?