Pictures:

Fruit Loop Train (32k)- A side view of the end car(s) and the shared bogie car(s), there are 2 of each. It took several Classic Train sets to acquire all the windows needed for 4 passenger cars. I used 2 different types of technic pins (see shared bogie below) so one side is "permanent" and the other lifts easily off in order to make it simple to set the cars on the track.

FLT (17k) - A side view of the original, ill fated, single axle shared bogie. This was an attempt at the Talgo; first inspired by an Amtrac train trip I took from Portland to Seattle, in early 1999.

Shared boogie (17K) - A top view of the shared bogie design. Note the ½ stud offset to pull the adjacent cars as close as possible with colliding the vestibules around corners. Also the 1x4 black tiles add strength to the 3 axle bogie.