have you tried emailing fisher-price?
a friends nephew also has a habit of taking his engines apart. as a result i no longer buy them for him for birthday or christmas, as he would always misplace one of the parts, and then expect either myself or his uncle to magic up a replacement on demand.
I was really hoping someone could help with an inside picture because I am interested in how it will go back together. I wish I lived close as I would like to take a shot at figuring it out.
Update....
I did email Fisher-Price. When I checked their website, they actually had a link where you could buy parts too! So I was a little encouraged that they might be helpful. It took about 2 days for them to get back to me and they sent me a link to the instructions for the Daring Derail set. I thanked them, as I thought it was nice of them to try, but I said "unfortunately, not only do I already have the set instructions, but they are not helpful as it does not tell me how that particular part is assembled on the inside" (which I stated in original email was the problem).
It's been several days since I responded and I have yet to hear back. This is kind of what I expected....not helpful :/
Very nice of you to help out Finn, I am anxious to also see how this goes back together
Thats actually very nice of Fisher Price but was it a part you needed or a schematic of the insides? Thanks for updating us Doc.
No, they offered me 1 of 2 totally different sets because that set is no longer available :/