The detail, and scale dimensions are excellent, however, the resistor value on the 3 way light is WAY to high. I had to reduce it to 1k for the green light to work. Once reduced the block signal was accurate and worked perfectly. This is in reference to using the two light system.

Unbelievable how small this product is. To be able to mount the wires on the pc board is incredible! And it works! Leds are bright. Only thing I had issues with was dealing with how small the gage of the wires. Seemed impossible to solder to anything, even to themselves. Other than that, a very good product.