Modification in CSS and slider for a WP theme

Hi. I need a modification in a WP theme (can't reveal the client data in open, pls PM me before sending proposal). The theme is Guesthouse. This theme has a slider that doesn't support Fade in/out but i have found a solution that adds this functionality. However some issues occur (cause of the CSS) to the theme. I can give you the solution read (adding Fade functionality) and what needs to be done in the CSS and just need someone to fix it. It is not much of work but I have multiple projects in my plate now and some bottleneck is happening.