Congrats and hope Klamath was fun!
Some lee helm may be "normal" simply because you're hoisting a huge amount of sail in front of the center of resistance.
You could try a little more mast rake. But you'll probably find that there's a balance between weather helm upwind and lee helm downwind.
Thanks! Klamath was lots of fun, and for whatever reason the new rig worked perfectly. I thought we'd have lots of tweaking to do and lots of "we're going to die" moments. But actually with the self-tacker and the SNU snuffer it is very easy to sail.
The boat doesn't quite go upwind like it used to, so a little more rake might pay off there as well.