Thanks... I did design, and build, it myself. I had the ferrules welded into the keggle (after polishing and drilling it). Same machine shop put the groove in the shield. Everything else is 'off the shelf' parts.
I do have some stickers from Bobby_M to add lines to the shield, for the levels, but haven't gotten around to putting them on there.
During the keggle rinse, after yesterday's brew-day, I simply ran rinse water from the top fitting (inside the keggle) to 'wash' the tube inside. I can also simply take it off the keggle, remove the glass tube (o-rings under the nut, and between the end of the tube and inside of the fitting) and use either a nylon brush (made for keg dip tubes), or give it all a good PBW soak.
I took some design ideas from the Blichmann setup, but made it actually easy to take apart and clean.
I had a weldless version on my first keggle, which I sold (entire setup).
I used to take the sight tube off when going to my brew-buddy's place (couldn't brew at home). Now that I'm able to brew at home, I just take it off to clean and that's it. I store it on the keggle, to make setup easier.
BTW, I also have a pair of o-rings between the glass tube and shield. Those act as spacers so I don't need to worry about the shield doing any harm. I guess you could say I thought about this a bit before making it.