Thank you Don for a fantastic triple video of how to install the Kato light kits. I've just bought a Kato Thalys n scale set which is more or less identical to yours when it comes to fitting lights. I've put lights before into other Kato sets and they look great but I've had more difficulty with this latest set. The height of the led unit is not precise in these coaches and I think I've pushed mine a bit too low down, but I can raise them a bit if necessary. However the one thing that I was not aware of, and you have solved it for me, was how to fit the clear plastic roof lenses into the body of the coaches. I didn't know that there were corresponding lugs and recesses in the lens and the window strips which when positioned all clipped into place. I learned something new today !! I'll take mine apart and try again, I have some spare lenses. I did put some tiny spots of superglue to hold the windows in place as I got fed up of them always falling out. One more thing, I think I noticed that you have the same problem as me, the end of the coach where the light is fitted is much brighter than the opposite end. I saw a KZbin video yesterday where someone has put a bit of black sticky tape over the led and the first bit of the lens and somehow it stops all that glare and diffuses the light further down the lens. I'll try it to see if it works. Thanks again for your patient and informative videos.