Hello again
It's not half bad for the money but needs several things done to it before you take it racing.
1. Ball bearings
2. different shocks
3. New style T-plate
4. the hinge pin holder at the back needs bulletproofing or replacing with aluminium.
All in all you might be better off getting a second hand B4 and take that racing. You can then draw from a huge wealth of setup knowledge here on oople and spares are easy to come by.
Not saying the MadRat is bad it's just the B4 is hugely popular for a reason