I am beginning to think this is going to be a dificult rifle to keep alive in the future.
There are no spare parts available for it, and nobody seems to have any information about it either - apart from the very helpful exploded parts diagram Garvin managed to find and contribute to the last thread we had about the Model 100 on the BBS.
Perhaps owning one of these rifles is a bit of a liabilty for regular use as the first time it fails and needs any important parts may be the last time it can be used.
Most rifles have a bit more information and knowledge available to support them and keep them working and fit.
The Model 100 does not share any parts that I can see with its predecessor the Model 75 - a rifle that does enjoy good support and has a good spare parts supply.
I find it very strange that this newer model has become the "forgotten" Diana - a model with no spares support when compared with even the earliest M&G models.