Just an opposite side of the coin here... better LFSs will NOT refuse to hire you based on knowledge unless they're specifically lookinf for someone with knowledge. Most entry level positions in your busier, better, LFSs are going to be grunt-level clerk positions. Many owners and managers, as well, of these shops are more than willing to work with the knowledge you have if you have the willingness to work for the wages offered. Good shop owners will also limit what you're allowed to do based on your knowledge and experience, and will adjust your duties to your abilities. Bear in mind, I'm talking about a multi-employee, busy, and better, shop, not one where there are one or two employees per shift not counting the owners/managers.