Hey Grendels, I am really enjoying your series on lighting and electronics.   I have watched a lot of videos on youtube about wiring LEDs with a 555 chip and most are terrible.  I look forward to you getting to that part of your series.  You seem to be going at a reasonable pace, explaining each step and giving us some really good closeups of your work.

As far as getting that glow for engines, what about the option of using the side-emitting fiber optics.  I know you talk to MMT a lot and i remember he did a review of these recently so i am sure you are aware of them.  What do you think about them?

Another method for dispersing the light inside a model that i have seen is to use cotton balls.  This method was used in an episode of Plamo Tsukurou, where the modeller was depicting the fire in Azuchi Castle. He put some LEDs inside and stuffed stretched cotton balls around them so your view through the windows was an orange glow throughout.  I suppose this method would be more applicable for the fire because it also simulated smoke as well.

Again, keep up the good work.