Polarisdave,

Well, that's a great effort you put in there and it appears to have enough gizmos to keep a little boy happy. I like the lighted stacks and I think the high intensity LEDs in the searchlights looks very authentic. Looks just like the light from a carbon arc searchlight.

Does your son operate it any? I'm not saying he's too young for it at all, but it would teach good hand/eye coordination even at 4 years of age.

What motors did you use?