Shopify Slideshow & Header Update

I run two Shopify stores that sit under the same account and share the identical theme and product catalogue. I only need two quick theme tweaks that should automatically benefit both storefronts once you touch the master theme... (Budget: $30 - $250 AUD, Jobs: CSS, Frontend Development, Graphic Design, HTML, JavaScript, Shopify, Shopify Templates, Web Design, Website Development, Website Optimization)