Visual of enginers is problem, its very hard to make visual diference betwen T1/2/3 enginer, they are looking very simillar. I must all time zoome out for found that T2. I know thats not easyst change visual...
Maybe somthink like its with aeon, t1 one buble, T2 two T3 three bubles, or something diferences.
Or maybe will litle help change size more radical.