Even with the fancy foot scans I frequently have to do returns because the shape of my left heel is different than the shape of my right one. The overall length

Even with the fancy foot scans I frequently have to do returns because the shape of my left heel is different than the shape of my right one. The overall length and with of the shoe as well as the height of the foot fits well, but the heel counter shape can cause a lot of trouble. I tend to buy another pair in the same model and size when I find a decent shoe, but obviously this doesn't work across models and brands. Last month I did 3 returns until I found an acceptable model.