I own a pair of Orvis wading boots and was looking at buying a new pair of Korkers boots. I love the idea of being able to switch soles so easily depending on the conditions rather then having to change the whole boot. I saw mention on their website of Korkers Oversoles that are made to fit over existing boots. Seems like they'd be a great idea for ease of use and cost. Has anyone else had any experience using these Oversoles..? How do they stand up to use, are they secure once mounted over the boots..? Would you recommend getting a pair..?