Milton 

Colorado Bouldering by P. Benningfield rates V3. That's strange, as the inventor of the V rating system, J. Sherman, uses Milton as an example of the benchmark for V4. (See Hueco Tanks, Climbing and Bouldering Guide, 2nd ed., Chockstone Press Inc., 1995, p. 20).
Not a big deal, but I've always been a little miffed at Benningfield: Milton does not seem like a problem to downrate.
My beta: either R or L foot onto obvious, greaser hold, then go to top with L hand. I've seen others use R foot up and R of greaser hold, and go to top with R hand. Mantel exit is much easier but not totally trivial.
I've done this on warm summer days: maybe it's easy when cooler. Beautiful moderate/hard problem.

This thing is so much harder than V4. I send V9 with one session of working, and this thing took me 15 goes to send.

Fun alternate (Milton Dyno V5): dyno from the starting holds to the lip, and mantle over.

Much more fun, in my opinion...compared to the original problem. Did both versions today, and this dyno was a lot of fun.