After having called roebuck in the rut in Germany, Austria and England for twenty soemthign years, I'd advise rather to use the buttolo reed call, or any other type of reed call rather than the rubber or rosewood call. Both of them are quite useful isntruments, but the whole scala of doe and fawn call is by far better to be imitated witha reed call. A german chap called Klaus Demmel makes very nice ones form antlers, called Rottumtaler Rehblatter, which I'd recoomend, having used it myself. If any help is needed getting one from Germany over to the UK, I'd be happy to help.
Also I'd recommend to get Richard Prior's tape on how to use a call. His knowledge is vast and what he says about how a call is to be used is absolutley right.