This publication ring has all the functionality of the other novel rings on Thingiverse, but I've closed off the thumb tube in order that it does not slide your thumb down. I thinned the all of the walls down as best I could to reduce material use. Enjoy!
NOTE: You'll need to rotate this 180 degrees in Makerware to have it sit flat on the "non-dome" side. This is done in about five seconds in Makerware.