Steve,
Sorry it took me so long to get back to you, but a man has to work some time and can not be on line 24 hours a day.
a) The exact routing for the B 110 is exactly as you described it. The bus that was seen on Carlton Ave. is a possibility because the drivers are given wide latitude to deviate from the route to make time when the BQE is backed up. I have also frequently seen them use Hicks St. which runs parallel to the BQE, northbound to avoid traffic.
b) The turn-a-round on the Hanukov Ocean Parkway Route would be Ave. R to East 7th St. to Ave. S to East 8th St. to Ave. R back to Ocean Parkway. As far as the Hanukov Bensonhurst Route is concerned, I have never ridden it so I can not confirm where the route ends or turns around at the end of Bay Parkway. I will try to get that information for you but it may take a little time.
c) The Crown Heights Community Council Bus to Boro Park still operates over the same route that you describe.
By the way, I did get your e-mail and I just love that music.
KING SOLOMON