I tried removing the rear wheels from the drive bogie and noticed a marked improvement in performance, although it still wobbles and shakes more than I like. I found some videos of the train on youtube and those trains also slow down and shakes/wobbles in curves so this seems to be normal behaviour for this train. I have also noticed the sound volume is so low only the whistle is barely audible when the train is in motion. Usually I think toy sounds are too loud but these sounds could do with a little more volume as the train itself makes quite a bit of noise. I also watched som videos of the 29210 train and it moves much better the 29370 train, more like the belgian high speed train my niece is getting.

I'm seriously considering getting a 29210 freight set and switching tracks with the 29370 set. That way my nephew gets the figure 8 all plastic track with a better running train and uncle gets a chance to try this newfangled C-track. I also imagine the diesel train in 29210 is easier to place on the track having no bogies. The kids will get one 7224 plastic rerailing ramp each which I will include in the starter sets. I would then sell the actual train from the 29370 set. It works, I'm just not happy with the performance so returning it to the store is not an option, especially if I want to keep the track.

/Tomgi