Still working on it. I'd probably have something ready if the holiday order volume wasn't a factor. Note to self, develop new stuff in the off season in the future.
Right now I have a few people who actually have time to brew beta testing the prototypes. I'm also playing with assembly methods. While my DIY monkey brain wants a new spot welding machine in the garage, the payback would be like a year. I've been having some success with semi-tubular stainless rivets and my air hammer but the larger clips for the big fittings/valves don't leave enough clearance for tools so stainless blind rivets are probably going to be the choice.
The last bit of feet dragging, which may seem completely lame to many, is waiting for my BrewHardware.com metal stamp to arrive so I can finally do some product branding.
kincade - Mcmaster.com calls them tool holders. They come in many different materials and sizes. Attaching the larger plate to a 3-pc valve requires that the two bottom bolts are removed, the clip pops on, then the two bolts go back in. The much larger clip may have the grip required to go over those bolts but it would be a bit obnoxious.