How can you make infantry dig in?

[Zipuli]

But even small holes where you can lie covered is sufficent when mortar shells start hitting the ground around you. This can be done quite fast if not under fire. The improving of positions feature was a good idea in SP3, but it was a bit too fast and gave a bit too much cover (tanks!! they just don't dig around without the blades, and those are not installed in 2 mins)...

I think it could be nice if infantry could in say 5 combat-free (not being pinned or greated) turns improve their positions a little, not much. Small hole ~0.5m deep where their whole body would not be over ground level, giving X amount of extra cover (+ hide?) in that hex. Of course inf in cliffs etc. would be unable to do so. Idea worth concidering?

Zip