I had a used Radio Shack RX-1500 cart about 5-7 years old for examination. It's got AT logos on it. Here's a link I found to a replacement stylus for it. http://www.lpgear.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=LG&Product_Code=RSRT1500 I only had maybe 100 hours on it, probably less. I usually cleaned the stylus with alcohol/cotton swab. The stylus was not cleaned before it was stowed away and I did not clean my vinyl back then too. This exercise was not meant to be a cleaning technique test. I was simply curious what it looked like at high magnification but I did a cleaning test for the hell of it. One important note. The sample being looked at needs to be conductive in the scanning electron microscope. Unfortunately, the diamond is not electrically conductive so there is some bright "charging" on the diamond. Therefore the diamond look splotchy and uneven with bright areas. But, for the third set of photos I sputtered the stylus with a thin layer of gold to make it conductive so there is no charging on those photos. The diamond is a lot more interseting in the third set due to a very clear photo. First Set - Stylus as is, before cleaning. Second Set - After cleaning with a piece of Magic Eraser, up and down into it about 10-15 times. No compressed air after the ME, I forgot. Third Set-after coating with gold. The diamond details and topography is easier to see now. Looking straight down onto the stylus from above, the leading edge is down and the trailing edge is up. So, the perspective is that the vinyl would be traveling in an upward direction in the photo.