Okay, if not august, it would be start-mid of septemper. 10-15 days more doesn't mean that much.
Really? 10-15 days @450MH/s on LTC would make a very big difference IMHO. Do the math
KnC miner was ordered few months before vaultbreaker was announced.
Cancel titan, order vaultbreaker. Problem solved.
According to KnC website, purchases are non-refundable.