Aggie -- if I remember correctly, the Monogram 1:72 B-36 remains the largest injecion aircraft model ever made, still beating the Trumpeter 1:72 Tu-95 Bear (it is 1:72, right?) on total span and mass. However the largest injection kit of any description I believe remains the Nichimo 1:200th battleship Yamato, at nearly five feet long.
Anybody got any other candidates? I could offer the 1:35th scale Dora railway gun (which coincidentally is the Internet Hobbies commercial in the right hand column as I type this!) as a candidate for greatest sheer mass, plus over 2000 parts, in the same category as some of the Heller 1:100th scale ship kits.
Cheers, Mike/TB379