I think I understand the concept of using interlocking switches (08 interlocking) but I cant seem to find a good write up of when and how to place them. For instance what is the difference between a searchlight 08 and an 08 interlocking? Is there something magical behind the scenes to make the interlocking switches talk to each other? Normally I just use 06's and 04's but there are a couple places where interlocking 08's would seem to work better for me but its hard to get a good understanding of "how". Leaving a mainline entering a yard area where there are a multitude of upcoming diverges, Id just as soon use an 08 with speed controls then just 06's. Thanks in advance.