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I haven't but with the research I have done I'm thinking Eskimo pistol bit or strike masters new lite flite. would both be good choices . The k-drill is only 7 1/2 inches and I have read people having trouble with slush layers in thick ice stopping the k drill .the heavy slush layers stopping a k-drill may be a cordless drill vs gas powered issue more then the k-drill .
I also have read some stories of broken flights on k-drills. From my understanding all 3 of them have some sort of plastic flights so I'm not sure who's is most durable ,but it should be considered. With the k-drill the flights are replaceable in sections I'm not sure about the others .
They all do have a flexible composite material for their flights. My Lite Flite has removable, replaceable flights. Ive thought about removing the last one, and save it as a backup, just Incase one breaks.