Scotty, the way I understand the danger is this. Since the air port to the isc is at the bottom of the TB, when dufusses spray a whole can in there, they flood the ISC chamber and submerge the isc pintle and the solvent eats the insulation and shorts the isc coils. You prevented this by spraying sparingly and removing the isc. There's also a mechanical (as opposed to ecu controlled) fast idle valve in there that works like a thermostat with a wax pellet inside in addition to the isc, which passes additional startup air at cold soak startup and closes very quickly. It is made into the TB and can not be replaced. In some cases the solvent penetrates the way pellet and collapses it, leaving this FIDLE valve wide open, and you can not control the idle speed below a very high level, like a permanent huge vac leak. If it runs fine now, you didn't ruin it, but just to be safe, you might mine the boneyards for a shelf TB as a backup.