[Plugin: NextGEN Gallery] Sidebar widget single making thumbnail fill a space

Firstly great plugin! I have read through all the associated Alex Rabe site info and many weeks of posts here and trial and error editing of the appropriate nggallery.css file and have not managed to solve this myself..

problem page link

My difficulty is in managing to make a NextGEN sidebar widget set to display 1 thumbnail of size 350×263 in the space allocated being the same size as stated for the image. I have looked at changing descriptions to be display: none; but still end up with a thumbnail presented with a space for the description and padding to the right and bottom of the thumbnail image (widget area displayed in green background).

I would like to just see 1 thumbnail occupying the set space and achieve the same should the option be changed to display 4 or 2 thumbs instead in the sidebar widget NextGEN option settings.

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Can i suggest that if anyone with extensive knowledge of this plugin that one simply defines associations of css to the different components. For instance i am using the sidebar widget and looking at the css don’t know whether i need to edit album, gallery or thumbnail. So a screen capture of default views and references to css that control presentation..