I plan on getting an EL-01 sometime because they really are awesome knives, no lefty clip, but I can't complain much for about $10. I have also been eying a few of the Real Steel knives, specifically the Sea Eagle and Thor, but the Sea Eagle may or may not be ambidextrous, but I can't find anything one way or the other. The Sea Eagle is a beauty and has a perfect blade shape, though. If it takes a lefty clip it will have a permanent home in my pocket.
As for adding a detent, no drill press or machining skills here, so I would just ruin the knife and hurt myself.
I already have a Link and Vantage, the Link is great albeit a little beefy, and I don't care for the Vantage line, consistently mediocre flipping action and f&f issues, even though I eventually got 3 total that weren't turds.
I actually have a Chill on my list, but the same as the Nura, I carry knives with pocket clips and no lefty clip makes me a sad panda.