I bought my Reke 500 nearly 2 years ago and got at least 15K scanners on mine. I have pushed these galvo's to about 20K max set in BEYOND and they have barely even whined, but try to keep it around 15K. After about 200-300 hours, something happened with my 660 nm red diodes and are barely pushing a few mw so about to replace these. I'll create a new thread on my diagnosis and replacement notes.