Anyone built a butte headphone amp?

[matmosphere]

I know it's not pedal related but same skill set. I keep building one of my brothers pedals and I want to make the other one something but he doesn't play guitar. Im thinking a headphone amp as a gift and it seems like the butte is solid for the cost. Has anyone built one or used one in the past.

[287m]

'just' diy headphone amp?
cmoy ftw https://web.archive.org/web/20120813213204/http://headwize.com/projects/index.htm
or look at http://nwavguy.blogspot.com/ and http://www.jdslabs.com/