Hello Craig,
There is a shortage of anyone wishing to restore these machines.
I'm doubtful anyone will come forward who has undertaken a resto.
I have just started a History Record on the Model 16 Queens.
I will upload a parts list in the next day or so.
Yes, the 25RG was a standard fitment (I think).
It would appear that these petrol Queens were 'killed off' with
the introduction of the larger 30" Queens electrics.
I guess the non-bowling green use of the petrol Queens was
replaced by the Model 65.
I hope someone - perhaps your good self - will preserve one of
these machines for future generations. Engineered to last our
lifetimes, these would be rewarding restoration machines.
All the best.
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Jack