I read article about polish plans for armored dyvision before 1939/yes,we could have one if we gather all our tanks and trucks there/
Some was outright stupid/no infrantry,only tanks and mechanized artillery/ other slighty better/infrantry included/ ,but even then they forget to get enough trucs for delivering fuel,and as a result after 1-2 days dyvision would stop fighting even if there was no enemy.
So,it is good thing,that we never tried to form tank dyvision or even brigade.Well,brigade MAYBE would work.Our Mechanized brigades were efficient,after all.