Board Thread:Support Requests - Getting Technical/@comment-1295676-20150822033305

So before everyone gets sick of questions concerning portable infoboxes:

Here is the portable infobox I'm working on, and here is my wiki's CSS.

I am trying to set the infobox's width at 300px; for some reason it is wider, and there is empty space to the right, on the top, and on the bottom of the image area. Are there any suggestions on how I can get the infobox's width to be properly 300px, and do away with the extra space?

On a somewhat related note, are there any suggestion on how I could center the tabber text, either through editing the template or through CSS?

Thank you. 