1- About the related products, see this topic: www.flexiblewebdesign.com/forum-virtuemart-template-support/2697-related-products

2- You can use the "Flexible VM3 Template" plugin to create custom TABs. Total of 2 more tabs you can create. But those custom Tabs will be "static", will be "same" for all products. (unlike specifications tab).

CleanMart supports creating;
- 1 dynamic tab (Specification tab)
- 2 static TABs (Created through ""Flexible VM3 Template"" plugin)

You would need custom-coding to add more than 1 dynamic TAB (by using custom fields). Unfortunately we don't provide free support or step-by-step instructions for custom coding modifications.

Regards.

Hi,

Sorry for the late response.

1- The problem with adding product to cart is not caused by our template. See the console log when the add to cart button is clicked:


If you browse your website with www (www.btpdesigns.nl/) the add to cart works, if you browse non-www (btpdesigns.nl/) the add to cart doesn't work.

Solution:
- Open the /configuration.php file, find the $live_site variable and make it blank, like this:
the problem will be gone.

2- To center product images on category, open flexible.css file: btpdesigns.nl/selcom/templates/selcom/html/com_virtuemart/assets/css/flexible.css

and include this CSS rule:
to make them all same dimensions, your product pictures has to have same aspect ratio (search "aspect ratio" on google, if you don't know what it means)

3- NEXT-PREV: See this topic for the solution: www.flexiblewebdesign.com/forum-virtuemart-2-template-support/2631-virtuemart-3-template#11569

4- Overlapping (caused by CSS override) open flexible.css file and include this CSS rule:
5- Search: It must be due to CSS override caused by your Joomla Template. But looks like you fixed it already.

6- Use speed test tools (tools.pingdom.com). Compare the stats of your website and our Live CleanMart Demo (demo.flexiblewebdesign.com/cleanmart/index.php)

Enable Joomla "cache - progressive" to improve the sever response delay, Install JS-CSS Compression plugin to combine-minify JS&CSS files (to reduce HTTP requests). There are many different ways to increase the joomla performance, use google to find articles about it.

Regards.