During 1990, VQDW 66 was fitted with 'Roadmaster' bogies from the test wagon VQPW 1 and reclassed to VQEW 66.
It seems that the authorised speed for this vehicle was 115 km/hr ( 70mph ).
In July 1994, the vehicle was classed to RQDW 66 as part of the NRC recoding.