Hi, I'm looking to buy a new pair of bowling shoes, i've been looking the dexter's SST8, but was wondering, do we really need interchangeable push-off soles and heels? apart from changing from right-handed to left-handed (useful if you plan on selling the shoes or sharing them with someone else) I cannot think of a situation when I would like "less traction" from my push-off shoe. I would like to hear other opinions about this.