Building a rudder

[galleywench]

Are there any good guides out there regarding building a rudder traditional style. By traditional, I'm referring to a rudder that uses mahogany (or other suitable lumber) that is glued (or maybe not) and drifted together with bronze rod? I've read up on the NACA foil guidlines (I will be following loosely) and the inclusion of a Constellation design (I know Alberg added this as a design update in later models, but I'm not sure if there are downsides).
I've seen Tim's writeup on his daysailer project and a long discussion on the Pearson Ariel forum, but I'm looking for some practical advice regarding the following:
- how tight the drifts should be snugged down.
- how many drifts per given length
- are welded 'ears/straps' often used in conjunction with drifts
- seam and drift pocket filler

I've googled the s**t out of this topic but haven't found much on an implementation (aside from Tim's and Ariel forum) and I feel there may be a bit of a black art to these rudders.
Any help is greatly appreciated.

-matt