Just a quick note of feedback that the manuals for the Cub on CD that I bought from eBay, from the seller 411Software, are very good. The resolution is extremely high, all of the diagrams and charts are very readable, and I can print off the copies I want for the shop.
The CD contains: Cub Operation Manual, Cub Tractor Parts Catalog, Farmall Cub Implements Parts Catalogs (Group Index, Platform Carriers, Cultivators, Cub-144A, Cub-252A, Harrows, Cub-38A, Harvesters, Cub-33, Middlebusters, 1 Cub-17, Planters, Cub-173A, Cub-174A, Plows, Cub-153, Cub-194), and the Farmall Owners Manual.
I'm also fortunate enough to have an old computer in the barn that I can refer to when need-be. (Makes access to the forum a cinch too.)