Sounds like a fun idea. I made something somewhat along those lines. It’s much faster than the setup in a kit, but not 10Mph. It’s a makeblock chassis with a different motor controller and an RC transmitter. There is no makeblock board in it, though I plan to integrate one into the design at some point. The issues I found with using a makeblock board by itself were
-Speed is limited by the gear ratio of the motors. If you stay within the recommended voltage, they only go so fast.
-The Makeblock motor drivers output a PWM at 6V so you need to use 6V motors. I also found adding multiple motors with multiple ME drivers cut that voltage down so they went slower.
-Transmitter range with a bluetooth controller is about 30 feet max. I found no way to integrate a regular RC receiver with makeblock, though if it were programmed as an arduino with the added Makeblock libraries and RC receiver libraries it might work.
-Integrating a different motor controller with Makeblock is challenging. A Me High-Power Encoder is pretty beefy and would be able to supply Makeblock motors at their potential.
The configuration that I have is
-Makeblock chassis with 6x 9v Makeblock motors.
-10A dual motor driver
-8.4V NiMh RC car battery
It goes pretty fast, but not 10Mph like you want, though it is alot faster than it was before. The motors can draw all the current they need and it doesn’t slow down for anything. If you want 10+ mph you might thing about integrating different motors into Makeblock.