This is 480x284 which does look better, a 800x600 would be better still.
5 secs may be enough for the slideshow.
I tried the Sort feature but it went to a 404 page!
If you click on a thumbnail it stops the slideshow, you have to start it again by reloading the page. Don't suppose there is the slightest of chances that a stop and start button can be add sometime in the future......