I used to run the Vector template for my users to try to give a common look and feel to them. However you need to note that the template has not been updated for over 7 years. I also had another problem with Vector, users will try to cut-and-paste between the two systems, but of course the syntax is not the same. You'll get two sorts of messages: "you can't write proper syntax, when I put it in Wikipedia it doesn't work" and "your website is broken, it won't render my (perfectly good) Wikipedia text". I now run Bootstrap3 which is a fair compromise.