Make a Flying Train
So you have an interest in building a working flying train. I would suggest just using some glue and glue your seat section up to the top of train. Glue will work and hold for a while but it does not hold forever. I decided to make a modification that is more permanent. WARNING! There are a lot of problems that can occur while making the modifications. DO NOT TRY THIS unless you are very good with small drills, drill press, tiny screws and no tolerance for error. Now if you have decided you want to try this here is what I did and how I did it. First things you will need are, cutting tool, drill press, a 1/16 th drill bit and a 3/32 nd drill bit (Dremel # 4 bit I think), the train you want to modify, 1/8 th inch wood dowel, screwdriver, 14 SCREWS ( 0 - 80 x 5/16 inch ) and lots of time. You begin with cutting the seat section, I chose to cut the top seat flush so that I can use a spacer or you can just cut the seat section off at a lower height and leave part of the top of seat. Take top of train section and now drill a hole with the 1/8th drill bit between the fins. Placement of screw hole is most important and needs to be in center between the fins. Next take the 3/32 drill bit and drill some pilot holes in the back of seat sections. You need to make them all the same or the seats will hit each other when completed. I used a set of sit down seats as they have a larger back to screw into with more room to work with. I then cut some of the wood dowels for spacers and drilled out the center for the screw to go through. You may also need to modify the bottom of the wheel assembly with a sanding head as that part of the wheel assembly may hit the screw so you may need to modify it.
WARNING! This works but there are a lot of things that can go wrong with this modification. I do not suggest doing this to your train and I make no claims that this will work or that you will end up with a working flying train. This is simply what I did and with a lot of work you can make one yourself.
I still suggest you simply cut and glue your inverted seat section to the upper part of the train. As an easy way to make the modification.
Below are photos and information on how to create a flying train.