First off the system is buggy. Second off I personally would like to test out vulcan m1. I don't want to have to buy m2 at a higher price if I want to test it out, instead I would like the choice of either buying m1 or m2 at the base price. And also I have almost all the hulls at M2, but none of them are discounted for m3. And on top of that not all my turrets and hulls show the discounted price, even though I can buy them at this rank. Please take this into consideration tanki online team, for I love the game and I think this update has potential!!!