There is a very interesting carbon star right near M11. Its just a couple of FOV's away, so while you are in the neighborhood - see if you can find S Scuti.
http://www.seds.org/Maps/Const/Data/scutum_tab.html
Its not the reddest of the carbon stars, but is a pretty salmon color sitting in an interesting field of blue and white stars. Its worth the minimal effort to find (so close to M11).
If you've not looked for Carbon stars before, be warned: they are easy to overlook! That color doesn't jump right out at you like a faint fuzzy does, so work slow.
Also, be warned: once you've seen a couple, you might get hooked and will spend endless hours on the internet compiling lists of carbon stars
. If you get to that point, drop me a line - I've got a couple of very extensive lists compiled already
