Hi folks. Thanks in advance for any insight! I've been wearing through the outer metatarsal area of my minimalist shoe soles after just around 230 miles. With both Merrill Vapor Glove and New Balance Minimus shoes, I go right through the rubber sole and then the foam in what seems like no time, with my left shoe wearing through well before my right. I am a very recreational runner, averaging 10 miles a week. I taught myself to run (genuinely) barefoot about a decade ago, but quickly switched to minimalist sneakers. My only "injury" is a consistently tight/sore left hamstring. Do you think I: a) need better form? b) need to suck it up and buy shoes more often? c) need shoes with a more rugged sole? (Please recommend brands!) Many thanks!