regarding the rejecting take off after VR... Never an option.
Several decades ago, a BAC-111 (Dan?) captain rejected T/O at LGW above Vr - the a/c had been misloaded and the nosewheel stayed firmly on the runway when he pulled back - a/c stopped inside the available length no problem.
A few years later an Iberia DC-10 captain rejected T/O at Malaga above V1 with a burst nosewheel tyre and mucho vibration - went off the end resulting in a burnt-out hull and significant loss of life.