Tony, don't worry, you won't need the damper on the go, these bikes handle extremely well without. Up until the late 50s solo UK market Enfields were not fitted with steering dampers at all, they were only included on sidecar models. They seem to have been fitted to US models as standard, probably as a fashion thing but became a standard fitting on the Home Market when the high performance Constellation was introduced in 1958 and they then stayed on the twins right through to the last Inters fitted with the Enfield fork (the 1968 Mk1A Interceptor). Throughout this period the Bullets only had the damper for sidecar use. As an aside, the post-1956 frame handles extremely well, by the standards of the day and even now. I use my Interceptors hard and the frame has never been an issue, especially with modern tyres. The fork damping is another thing though!
REgards, Mark