I have been running in Saucony Cortanas for the last 4 months with Orthodic inserts (I have real flat feet) about 30-40mpw. Although I like these shoes, my calves/achillies are constantly sore, as I fear the 4mm drop may be too much every day. Also, they seem to be cooked at 150-200 miles. Does anyone have any suggestions for a similar lightweight trainer with higher drop that can accomodate my orthodic? I was considering the Saucony Breakthru...thanks!