I built the Faller Fair series Roller Coaster and this is what I learned:

The parts are very precision and fit together very well making me wonder why other plastic kits are not made to the same precision.

The toughest part is the 10 feet of track. The plastic part is articulated and if stressed too much will break. There is vinyl tubing that fits over the edges where the wheels of the cars roll on. It is tough to get on and get glue to secure it. The first 18 inches has additional vinyl tubing in the bottom of the track to control the driving spring that you have to install. It is most important to get that tubing in the track and leave a slot wide enough for the finger on the bottom of the roller coaster car to fit into. I failed that and with the spring in the grove is is impossible to fix without taking part of the completed model apart. In addition the track is fiddly to get correctly on the towers and I actually came up short by 2 inches because my curves did not match the desired radius and used too much initially. This also made the staircase not have enough clearance to the track. The instructions don't stress the routing of the track at all.

The decals and stickers have inadequate adhesion and fall off readily. Use some kind of glue to hold them on.

The track is super critical in alignment and angularity to get the roller coaster cars to make it all the way around with out leaving the track. When I failed to get the driving slot the correct width I decided that the roller coaster would be static.

Had I know the complexity of this kit I would not have bought it but hindsight is 20-20. I am not disappointed and initially realized that it might be next to impossible for it to really operate so the result proved my initial guess correct. But it looks good on my little trolley layout and is only part of my Fair area that is a work in progress. I have 6 other Fair structures (static) that I have yet to build but I think they will be fine if they are as precision as the roller coaster was. I am also going to add the Faller Swinging Boat ride (dynamic). Its mechanism is simple and should be easy to get to operate... we'll see.

Hope this helps.

LDBennett