Train Modelling Progress

I have been working a lot more on the train adding windows and doors to the sides. One of the parts I wasn't looking forward to modelling is the 'undercarriage' part between the main train and the tracks itself. I took a risk and just went straight for it with little to no reference. I think its turned out well and I am happy it looks good enough considering it actually won't be shown off at all.

Current model of the train. (windows removed temporarily)

Undercarriage of the train