Actually all.... I'm the one with the website and the idea for the drain plug warning system. No idea who the OP is. I posted the other thread, just trying to get the idea out. But sounds like I might have just what you're looking for. Anyways..... It was just an idea I had because I've made the same stupid mistake everyone has.
So, i got to work and after many revisions I finally figured out one that works awesome. In order to make it I had to buy enough stuff to make several. So, I passed them out to a few friends. They loved them. They convinced me to file for a patent and try to make these for other people. I hired a college student to put together a website for me and here I am. Trying anyway i can think of to introduce it. I'm no slick salesman with a marketing degree.
Theres all kinds of ideas how to remind yourself. Checklists... You can go thru your check list, get to #3 go to install the plug, and your wife hollers at you. You put the drain plug down to find out what she needs and you forget it. You can unclip it from your steering wheel. Go back to install it, and your kid slips and gets hurt. You drop the plug to help and forget. You can untie it from your ignition key. Go back to install, and your buddy tosses you a beer. You set the plug down to catch it, and crack the beer open and totally forget the plug. Tons of good ideas. But..... even though it was #3 on your check list. You forgot. Or you tossed it to your buddy to install, and he forgot. Unlike float switches this has no moving parts to go bad, or get stuck with seaweed. And if your float switch has triggered, it's too late anyways. This is a failsafe reminder. Turn on your key and if your plug isn't there, you get a loud alarm screaming at you. You put the plug in, and no alarm.
Anyways, it's just something I came up with to help prevent those mistakes, and help others out. It's a cool idea, works great and I truly believe it serves a really good purpose.
I believe in this so much, If there's enough interest I could put together a thehulltruth.com group buy. And let these go a bit above cost. Plus shipping. Just as long as you agree to email me with some feedback or a review. PM me