I think that if the basement is below the kitchen, you would want more resistance and possibly longer lines in the lower tap lines to make up for the added pressure from going downhill.
What about this? http://www.zorotools.com/g/00059936/k-G2681594?utm_source=google_shopping&utm_medium=cpc&utm_campaign=Google_Shopping_Feed&kw={keyword}&gclid=CLXnsvHnua8CFQhN4AodyjBlkA
Self-tapping screws, tin snips and some aluminum tape should be all you need. I've only worked with it replacing my cooktop so may be wrong.
I think you can get pre-crimped on one side if you don't have to run it too far.
I had this same problem with my first keg too. It wasn't overcarbed but the o-ring between the dip-tube and post (under the connector) was bad and letting CO2 into the airline. Took me about 1/2 a keg of 2oz pours to figure that one out.
If you carbed the same way as last time, I'd bet this...
I brewed a Weizenbock based on the recent BYO recipe on the 8th. Got really crappy efficiency but that's another story.
I made a 1.5 L starter (swirling, no stirbar yet) with Wyeast Weihenstephen the day before and pitched it all into about 5.5G.
1/8 OG @ 1.078 fermenting at 62 F - 17...