No way would I middle that either unless you are too exposed money wise and need to get rid of some of it to feel better. Why give back some of a great bet to get an average bet. Look at each bet indiviually and the under is good , the over isnt (unless you get a great bet on that side that beats the closing line). Good luck either way and realize that you still have a 40% chance you will lose the under and those always hurt more so be prepared.