I know literally hundreds of people on 3SI with modded 3/Ses (like I said, lots with 500+ to 1000+ horsepower) and not a single one of them has had an issue with their tranny (the synchro issues come with high mileage, not extra power).
I know what a 4 banger DSM can do- anyone who's heard of John Shepherd's 7 second DSM knows that :D
hey it's all good-at least the 'main' reason we're all here is the same:)