Originally Posted by
Barb Macdonald
Fascinating thread, thank you all.
Dumb person, aka me, forgot to clean lens (mirrors and encoder strips yes, lens, no) for a very long time. Finally noticed it, cleaned it, and I have two half-moon black rings (tiny) off centre of the lens. Vectoring improved as soon as I cleaned it, duh... Will I harm the beam if I don't replace the lens? Seems to be working fine. epilog legend ext, mature model from 2006. Airflow has been the bane of my existence, but it's the best we can do.
Apologies for the stupidity of the question...