I wrote this a while back and I don't know if much has changed, as far as current versions of the tank goes. It may or may not reflect popular opinion, but might be of use to you:

http://www.rcuniverse.com/forum/m_44...tm.htm#4427108

Jason

P.S. There are a lot of great modelers here and some guys who seem to have a knack for keeping these tanks running indefinitely, but Stern is the man on the Tiger 1:

http://www.rcuniverse.com/forum/m_3592742/tm.htm