Fast-Fix, the Boca Raton, Fla.–based jewelry retailer and servicer, marks its 30th anniversary this year. New CEO Gerry Weber (pictured), originally recruited as a consultant, talks about invigorating the brand.    How do you view the repair business in the context of the larger jewelry industry?  Weber: We provide a solution to our customers’ problems, be it ring resizing, stone resetting, watch repairs, watch-battery replacement, engraving services, eyeglass-frame repair, cellphone screen replacement, etc. With many traditional jewelry stores not providing many of these services, we fill a need in the marketplace. We have wonderful working relationships with the jewelry stores and department store jewelry departments in the malls we operate in.   What are the big opportunities for a business such as yours? Weber: Growth, through existing franch