Alright. I gotta point this out as it's been happening quite often when I use this upgrade...
The projectile HP of the Billy, since it has such low HP, (literally 4 HP), there is a chance that random fire will destroy it before it hits its target. I've seen a PD randomly shoot and accidentally destroy it, I've seen ASF randomly shoot and destroy it, I've seen the beam of a Monkeylord and GC kill it, and I've seen Harbs' & Brick fire kill it. Heck, I've even seen a torpedo kill it, too!
Wouldn't it be of benefit to increase the HP of the projectile drastically and increase the damage of the TMD to match?
Example:
TMD would deal 50 damage and standard missiles would have 50 hp, the damage from the TMD kills the missile in one shot - no change here.
If the Billy has 151 HP, it would still tank 3 shots with the 4th killing it.
This change would mirror the Nuke Missile HP change that was made a while back - to prevent it from being shot down by random fire as it is fired or as it is landing.
~ Stryker