I’m currently using a Le-7070 and about 5 yrs ago I was able to cut all lenses all day. Fast forward to about 6 months ago, and I’m able to cut about 7-8 pairs and it will not trace frames after those. I mean I turn it off and let it rest for a hour or so and sometimes will get back to it but recently it’s like I gotta let it sit for hours. I’m on the edge of buying a new edger but I’d like to know what could be possibly goin on....