Looking good, John.
That's one big chunk of aluminum.
How will you join the two halves.
There was a guy years ago named Alex Pong who designed a crankset that used two halves of machined billet aluminum.
He joined the halves using a dado like joint and some type of epoxy.
His company was called Magic Motorcycle.
The design was pretty impressive. It was eventually sold to Cannondale.
This article is from 1992.