I'm not sure exactly how many they did, but you list the VC tunnel and house. There are 2 "tunnel" kits: Jungle Ground & Tunnel Entrance (kit R008) and Viet Cong Tunnel (R007). Is that the Vietnamese house on stilts (kit R015) or the thatched VC hut (kit R011) - they did both. They also did the river bed (R009) or river crossing (which was very similar to the base included with Hobby Fan's set of troops crossing on a log) as you mentioned. I think it was also them that did another one that I cannot recall it's name, but was called something like "After the battle". The base looked like a napalm stricken area complete with bare trees and casualties molded in. Again I think was them, but it might've been Graffiti Productions or Grunt Gear. All about the same time and focus.