hopefully im posting this question in the right section...anyhow I have 1810 with a qa42 on it right now which doesn't do bad but looking to find the right dual stage blower that should be on it..best I can tell a 190-450 is the right one but have also been told that a 145-633 or a 190-364 would work..the last 2 I can't seem to find any information on...so if anyone could help me out id appreciate it...thanks for your time