technically it's doable, just out of my long curiosity, after all these years, the highest switching FR from smps amp is 1mhz, come on, we can push a bit farther
I went in with the kickstarter and paid fair bit less. But I agree, it is expensive at that cost.Finsix looks pretty cool, but a bit pricey.
I do not understand how an air core inductor would have lower copper loss than one of same inductance wound on a magnetic core that would use much less wire. I suppose you could use thicker wire in the air core one to compensate a bit.