Mickey:
Unfortunately the mirrors on the Waterlase do burn out and need refurbishing or replacement. Repair fee you mentioned seems awfully expensive to me but then I’m not a laser manufacturer.
Like you said, a full service contract on the Waterlase that does not cover the optical fiber has questionable value. The company tried that with me once and I just said NO. Maintenance fees on these instruments sometimes make me question the real Return On Investment.
So, my post is probably of no value but at least there are others out there that feel your pain.
Best Wishes,
Al