I have this Tamiya kit, and really like it. I added metal tracks to mine, and noted that the front hull (where the idlers mount) is as weak on the Tamiya kit as it is on the Heng Long or Asiatam hulls. I added an idler brace to mine, which is available from Forgebear http://www.ebay.com/itm/161747560676. Guido Henn of Henn-Tec also makes one that works very well. As far as references on the KV-2 go, there are a couple of good Tankograd books on it, or you can really splurge and buy the Neil Stokes' "KV Technical History & Variants" book by Airconnection (560 pages of everything you ever wanted to know, but were afraid to ask).