librandi Hi
Instead of decreasing min-height being injected through JS, by way of forced CSS declaration, You may instead add this to custom.css file and adjust padding value accordingly which would decrease spacing at top and bottom :
.t3-slideshow + .t3-sl-1 .t3-module .module-inner{padding-top:0 !important;padding-bottom:0 !important;}
Kindly ensure to clear your browser cache if changes dont reflect.
