On 26-Jul-2011 21:50, Doug White wrote:

The thing I'm pondering is how to best align the slopes so that I can
drill the holes on my mill.

The only thing about the part the way it's cut that is not radially
symmetrical is the 45-degree cut on one end. Whatever you come up
with is going to have to index that somehow. If it were me, I would
make a plywood box jig with sides to locate the pipe, with one end
cut at 45-degrees and boxed in. Shove the pipe into the 45 wedge
section and it is forced into alignment for drilling.
__________________________________________________ __________________
Gardner Buchanan gbuchana(a)teksavvy(dot)com
FreeBSD: Where you want to go. Today.