Phil does this for a living, he has two Tiger I that he uses as hard targets and fires various rounds at them using a Tiger II fitted with a rifle, this is all done in a controlled environment, he has also dumped one of the Tigers in a lake and recovered it a few days later.

Iposter, to answer your questions as best I can, the Tiger II I’m not sure who builds that though the Germans have a few in this scale http://www.stahlpanther-0.homepage.t-online.de/ have a look at this web site this guy defiantly has built a few tanks in various scales including a 1/5 Jagdpanther you could drop him an e-mail
He’s East-German and speaks German and Russian