It's an ampacity chain : power supply, control station, contact rails, decoder
The power supply is up to you
Control station/decoder : SCX is limited to the stock motor (in Spain, they immediately fried a decoder with a Slot.it 25k motor) - I would guess the same applies to Scalextric and Carrera - logically, Ninco should provide something more for their NC5/NC6
Contact rails (continuity) : SCX seems OK with the redesigned connectors, Ninco have a good reputation in this respect, I read that Scalextric and Carrera have problems on longer tracks and require power taps/jumpers
Higher ampacity aftermarket electronic packages will no doubt become available in the future (I'm told hardware is not a problem) - I just do not see anything above 25k as being compatible with MCPL racing, the allowable number of cars is more of interest
The power supply is up to you
Control station/decoder : SCX is limited to the stock motor (in Spain, they immediately fried a decoder with a Slot.it 25k motor) - I would guess the same applies to Scalextric and Carrera - logically, Ninco should provide something more for their NC5/NC6
Contact rails (continuity) : SCX seems OK with the redesigned connectors, Ninco have a good reputation in this respect, I read that Scalextric and Carrera have problems on longer tracks and require power taps/jumpers
Higher ampacity aftermarket electronic packages will no doubt become available in the future (I'm told hardware is not a problem) - I just do not see anything above 25k as being compatible with MCPL racing, the allowable number of cars is more of interest