Simple test: Take a piece of paper or an index card and slide the piece of paper under the left front foot. Ok, now slide it under the right front foot. I can notice a very obvious difference in the amount of resistance. Therefore, I can infer that my machine is not resting on all four feet with even pressure. Is this normal? The logic board, fans, battery, etc (i.e. all the heavy stuff is on the left side), which could be the reason why the machine applies more pressure to towards the left side than the right.