I do the same, only that my Cdisk is 120 GB. Still it takes only 20 min to restore with Acronis True Image.

Then I have everthing back with all programs installed and fresh as a virgin.

Runtimes and anything else important is on the Ddisk and backed up on external hard disks.

Still all is not perfect, if the house burns down everything goes! I must/have to arrange some space "in the clouds."