There were actually a couple different threads started by pdc on this topic, but the original one is here. Do the “find all threads started by…” thing and you can see some of the other discussion. In all cases, pdc helped arrange for the drilling via a very skilled machinist. I thought about having the fourth set done locally, but decided it was not worth the risk, so sent them back to the original machinist and have no regrets with that decision. I think there are other cranks that would be okay for multiple drillings, but it’s not something I’ve ever researched. I hadn’t thought of the concept at all until pdc’s thread came along, after which I could think of little else. 
You can still find Kookas on ebay and other online sources, but they’re getting rarer. PDC just ran into a nest of them somehow, and was nice enough to secure the lot of them for the unicyclist community.
It fit perfectly…the outside of the hole closest to the hub exactly touches the “bend line” where the plane of the crank’s surface shifts slightly. I was too hopped up on pho when I did the job today, so forgot to take pictures of the cranks before they were mounted. We can pull the pedal for an official JC inspection as soon as we get together for that saddle-building session. This weekend perhaps?