They are late, way to late! Heng long released them three years ago in several different options, from basic ones with plastic gears (all rtr) to steel gears with metal track. Detail is amazing with lots of small extra super detailing parts if you wish to add them on, all of that for about $300. What started as basic toy grade company, Heng Long advanced to a very high quality and detail manufacturer.Yes, the sound system is mediocre, but for about $100, you can upgrade the whole MFU to the authentic sound mix.
Here is my toy.