pcv making idle rough?

I wouldn't use starting fluid!
Use something like carb cleaner or brake cleaner with the long thin tube on the nozzle and be very slow and careful as they are very flamable. Spray in small bursts along the intake port top seems and around the base of the carb. Any change in idle speed or quality means there's a leak at that spot. Don;t spray heavy as it can also evaporate and get sucked into the carb - which has the same affect.

If the bolts all started easy in the holes it's probably fine but I'd test to be sure. Also - you will always have to adjust the carburetor for any changes in the engine - or somethimes because of the weather... so don't be afraid to have to touch something.