Hi,
Last version added a 95% resistance to walls instead of 100%.
I agree that a 100% resistance against explosions is too much, so lessening the resistance to 95% (perhaps even 90%) feels OK and adds realism to the game.
But the effect of Wall explosion proofing technology is still given as "Wall explosion immunity". Immunity, however, implies a resistance of 100%. Now that you've lessened explosion resistance to 95%, you should change the description to something like "Make walls explosion proof", "Harden walls against explosions", or "Make walls more resistant against explosions".
Also, the description should be changed from "Research into reinforcing walls to make them explosion resistant to work better in combination with cannon turret" to, e.g., "Research walls that are less vulnerable to explosions so they work better in combination with cannon turret".
Would you change the texts, please? Otherwise it would be confusing to players because you make promises that the mod doesn't keep. :-)