Vintage Dirt Bike Q & A

Hi all, just joined this forum, bought my first Montesa for 40 years! A Cappra VB 1977, I had several Cotas in the 70's and now have several Bultacos.
The Bultacos seem to be very well catered for in the manuals and parts book areas, several engine rebuild guides and the parts books are well numbered and detailed ... in a couple of languages.
The Montesa's on the other hand seem to be difficult to find information and details. The parts books initially look detailed but try Googling a part number and it's often a dead end.
Information comes from the experienced blokes who've lived and known these bikes for years.
My question is, are there any rebuild manuals about?
Every time I want to know something I have to Google for an hour or Facebook a question on the groups.
I have a feeling this will be the first of may questions on here.