I’ve been machining my own cranks for a while:
corbin
Nice job Corbin. Not knowing much about metal strengths I’d kinda be worried about them breaking, but I would guess that it would take a lot to break them.
Agree with Jeremy, Sam’s are much cooler looking 
But some people are already cool 
neat job Corbin! I read about the cranks you milled for another rider a while back too. Would love to have a mill to mess around on like you’ve got there.
My milled cranks are on the 24 GUni these days, no problems with them so far.