Errata - KV Technical History & Variants
Graeme Malyon has pointed out that the scale drawings of the KV-2 on pages 533 thru 535, labeled as being the November/December 1940 production batch, in fact depict the later May/June 1941 production batch, and are duplicates of the drawings on pages 536 thru 538.
I'll shortly be posting a PDF here with the correct November/December 1940 KV-2 drawings.