Welcome to the Cub Family, and being #800. Which means of course there is only 200 left to the magical number of 1000.
Here is what I suggest you do and I think all would agree. The most important tool for working on your Cub is information. If you go to Binder Books
and order the Owner's Manual, TC37-F Parts Manual and the GSS-1411 Service Manual, you will be well on your way to acquiring that info. Until you get your own manuals, you may find various revisions on the Cub Manual Server
as well as many other interesting manuals and such. The Best of H.L. Chauvin
as well is a very good reference and helps immensely in diagnosing and fixing problems.
Donny's reference to the ATIS FAQ's
is a good source as well. Oh they are all accessible at the Cub Manual Server.
Hope this helps, and again welcome to the family!