I have a collection of TT stuff since 1968 and there are many scratchbuild machines ( one of them is my avatar here). They are very old constructions ( the latest one is from 1983) a Mallet (articulated 0-6-6-0) locomotive of the Hungarian railways and not to today standards. They were up to date 30 years ago with that technology and available machinery for domestic production ( my home made mini lathe was on kitchen table :-) ). I will make some pictures. In the GANDTT topic I just wanted to show the progress on my layout, the vehicles were not in focus.
I built a parking garage for one of the stations. The garage is in underground and I am hesitating what is better for the layout. When I put the obligatory barriers the effect goes, one cannot see anymore the deepness of the garage.