Sore feet inspired Peter Padilla to learn everything he could about shoes and the feet that go in them. Now the knowledge is allowing him to step ahead in business."When I was a young man I had foot problems, and it actually got to a point where I almost had to leave my job over it," said Padilla, the owner of Specialty Footwear in Spanish Springs and a trained healthcare professional who knows all about footwear.Over a couple of years in his youth, Padilla acquired the knowledge, equipment and materials to make his own shoes.After resolving that problem sufficiently to …