I would say no using Science to dismantle in a town if that town is currently under TC timer, or within 15 minutes after TC timer ended.
But the actual Science dismantling skill should be increased to provide HQ materials, not make it an even more worthless feature by having chance to fail. PS: Chance to fail is already in it; sometimes you don't get anything from dismantling.
I still want to know how adding a chance for the weapon to not turn to dust with low skill would make it useless, as it is if you have 100 skill, you have a chance to get something. but if you have 30 or so skill, than just damaging the weapon is reasonable, i'm for adding a high end to it, so that you can get HQ stuff, but at the same time, it shouldn't be a weapon, and the TC timer thing won't work, most battles happen before or after the timer starts/stops.
I still wonder though, why a 80% chance to just damage the weapon rather than fully break it if you have 20% science makes it useless? if you want to use the skill, add skill points.
-Ulrek-