I don't know much about the Ninco wall mounted transformer - In general wall mounted transformer are quite weak. Make sure your power supply can provide at least 1A of current for each car.
Other than this, Ninco LCs can be left in the track during analog racing, provided you remove the shorts across tracks that Ninco have as default. In the Modena club we've embedded lane changers and most racing is analog anyway.
The issue you may have is mechanical - but this is true no matter if you race analog or digital: the way the LC is designed, the plastic lining which creates the slot, between rails, is interrupted right in front of the flipper to make room for the flipper's movement. What we've seen happen is that the pickup can collide head on with the gap - with consequences you may imagine. The workaround, which works very well, is to insert a very thin sheet of brass like in the attached picture.
Other than this, Ninco LCs can be left in the track during analog racing, provided you remove the shorts across tracks that Ninco have as default. In the Modena club we've embedded lane changers and most racing is analog anyway.
The issue you may have is mechanical - but this is true no matter if you race analog or digital: the way the LC is designed, the plastic lining which creates the slot, between rails, is interrupted right in front of the flipper to make room for the flipper's movement. What we've seen happen is that the pickup can collide head on with the gap - with consequences you may imagine. The workaround, which works very well, is to insert a very thin sheet of brass like in the attached picture.
