wrote in message
If you float in above the threshold a fair bit higher than Vref, is it
acceptable technique to chance the reverser to preclude landing too far
down the runway?

The acceptable technique is to discontinue the approach and go around for
another try. Unstabilized approaches account for a large number of airline
landing incidents.

As for the use of reverse, most airplanes prohibit using thrust reversers in
air because of unacceptably high sink-rates, assymetric thrust when one
deploys and one does not, or flight control surfaces losing effectiveness
due to disrupted airflow.

D.