T 1069 (JS2157) is a station I've used many times, starting in 1999. The first photo shows what it looked like in 2002 (not my photo, it's from the datasheet link). The second photo shows what it looked like in 2022 (I used it for a rough vertical check). The third and fourth photos show what it looked like when I got through with it this morning.
Edit: I can't seem to get the photos to post in order. And I can't figure out how to do inline images. This platform isn't very post-friendly. 🙁
Edit: Okay, the photos are now in order, left-to-right, up-to-down.
P.S. Want to know a great method for thinking you've posted but actually didn't? Forget to specify a forum. Your post them seems to disappear into the ether without warning.
Not sure why my photos came in so low-res, so trying again. (The datasheet photo is at full resolution, which isn't very high.)
Nice work, what kind of hole saw did you use? I must have a very short pilot drill.
The hole saw was nothing special, just a good-quality (Milwaukee, as I recall) high-speed steel one.
The nearest bolts holding down the grate were a couple of feet away, so I was able to pry up the corner and jam a piece of 2x4 on top of the disk to make sure I didn't damage it while drilling. I didn't do a very good job of guesstimating the location of the middle of the disk from above, which is the reason the hole is so far off-center. But it's close enough to get a pole point on the datum point, and anyone planning to use a level rod will have to use a spacer anyway.