I think you have two options, either the Thark way or you make the top arms larger than the lower so that the lower will fit into the armpit of the upper when the upper arms are down. If you do that, then the pects wouldn't have to be separated as upper and lower.
Sales taxes always hurt middle to lower income families much more than anyone else. That's why raising them, and lowering income tax is bs. (arbitrary numbers to show what I mean) family makes 2,000$ month and pays 200$/month in groceries. lets say Sales tax is 10% so they actually spent 200$ on groceries and 20.00$ on…