Just like to point out that there are airplanes out there that v1/vr/v2 are all about 1 knot apart. And technically, even though the AFM guys are going to throw rocks at me. V1 can equal Vr and Vr can equal V2. Nobody that I know of does that, but if are flying a Heavy run your takeoff calculations at MTOW and MAXimize Vr to clear the 35 ft obstacle. In otherwords, leave V2 what it is now and push Vr as close as possible to V2. If the MAX Vr is more than V2 set V2 equal Vr. This will cause the pilot to track down to V2 +10 instead of trying to accelerate to V2 +10. I like to call it "Flare Recovery".