Topic 1 - The module seems to be 500px in height. There doesnt seem a way to change that? Can it be done via module, or do you have to change it in the CSS File to add a precise height: 250px to it?

Topic 2 - The module only supports 2 styles, wood and black. How can I add more? Those two styles just dont work for my site visually. I tried replacing the bg-style2.jpg file with one that more matches my site. Is there a better way?

Topic 3 - The module seems only to support 2 column blocks. You can switch left to right and vice versa. Is it possible to change the % from 50/50 to maybe 25&75 or another split of the width of the module???

Topic 4 - Best guidance on image size. See attachment for this and the above items.

Dear sir,
1. Because this is the responsive module, we don't be fixed height, it change depend on your image size.
2. You can add other style in file code .xml and .php OR change other image background.
3. We only support two columns 50/50, if you want to change you can customize css file.
4. You can change image size in admin. refer our documentation::
www.smartaddons.com/joomla/extensions/extension-user-guides/776-sj-k2-slick-slider-userguide

Thanks.