Yes Paul, I just order a few on line at a time and change them out ever 100 hr. I haven't had the prob you had but never know when you are going to pick up some rubbish in the fuel. And yes, the 912is system takes a bit of understanding and the warnings too. For instance, I went to start up recently and had a solid Lane B light - My EMS told me the EGT sensor was over heat ( although the engine was not running!) - obviously a sensor. Relatively easy fix ( expensive !) but what I didnt know and have since learned is that the EGT sensor info is not used by the computer to adjust fuel mixture - so it would have been fine to fly home if it happened somewhere. Apparently the system checks the injectors for that pot to make sure they are ok. I would carry a spare of them to but at $270 each I think that is a bit extreme!

good flying

r