I have a Pro Sport one. I dropped it once and dented the outter ring. The needle is still on 0 though, and it worked just fine for me for a couple weeks. I ended up replacing it with another one of the same kind because I didn't want the dent.
If you want it it's yours, come grab it. It's actually still in the box, it's damn near brand new still as I only used it for a couple weeks, pretty sure all the hose and stuff is in the box too.
I don't have a pic, but here's a video that shows it when I had it installed (skip to about the 1:00 mark). You can see the dent on the bottom of the ring.
http://www.youtube.com/watch?v=wLIJQM6zv2U&hd=1
Linear Mode
