Utility train with crane- H0 scale (1:87)

Currently it is not a motorized version. I'm working on a motorized version, but am waiting for electric motors, gears and worms delivery.

I haven't printed it yet, so any comments and/or suggestions are very welcome.

You can use the following wheels:

https://www.amazon.com/Walthers-Proto-HO-Scale-Wheelsets/dp/B0167JW67C/ref=sr_1_9?ie=UTF8&qid=1519677168&sr=8-9&keywords=model+train+wheels

OR

https://www.aliexpress.com/item/24-PCS-36-Metal-Wheels-for-Model-Train-1-87-HO-Scale-New-