Yea I can fix it, as for the customizable delay it sounds possible but I'm far from being good at modding so it might take me a while

Are you still updating this? All structure damage has been doubled recently.
And I do notice some mistakes in this mod's document like <RequireItem> in <Deconstruct>(should be <Item>)

Not bad, you even got the APHE function down to a T, though I'm wondering can you create a modifiable version of the shell? So you can get it to detonate later? or perhaps even earlier?

Seems really cool! Can't wait to try it out next campaign. And maybe sneak a little peak at the code to see how you did it ;^)