As for the design, I can say: so what, what looks like this. The main thing is that the cabin was an overview, noise insulation.
T -4a is one of the tractors which at one time was sufficiently reliable, maintainable. Of course, with the comfort was not very, but it is better to say nothing.
I had 3 t-4a in the brigade, so we did not know any problems with them. Of course there were repairs, but compared to the same age dt-75m is much more reliable.
For example, for small farms it would be a good tool for planting and processing. It is a pity that the plant was destroyed.
An interesting development was in the early 90s .. Just a pity: whores are buying expensive cars and apartments, and such factories don't care. What kind of country we are.