Saipan:Caves

[campsawyer]

Just finished a scenario with caves from Saipan. A very good scenario and a worthy one, but the caves rules has a hole, specifically with units both inside and out. As in my prior post how should the units be treated when they are in and out of the caves.

Here is an example, a Japanese LT 10-1-1, 2x4-3 INF are outside and a 6-4 HMG is inside. What happens when:

they are Direct Fired/Bombarded, do they count as a "3 stack" and the +1 column shift is applied or does the immunity for the 6-4 HMG extend to the column shifts?

they are assaulted, does the 6-4 HMG participate or is he screened by the outside INF's? If he does participate , how does the -2 column shift apply? If he is screened, does that mean that the units outside must be defeated first before he can be attacked?

These are key questions that depending on the answers could have changed the outcome of the scenario. Any thoughts are appreciated.