This probably would not qualify as a midsize tractor...but the Farmall Cub was one a lot of old timers in days gone by said was a great little tractor for mowing.
The Famall Cub was indeed good tractor for light mowing in its time..but for a short time,for the Farmall A & Super A kinda took the fun away from the Cub{depending on the year of the Cub hp well below 20hp}
A's..Built heavier,More HP and PTO HP etc..I believe Farmall A and Super A was trying there darnest to keep up w/Ford N models at the time.