Kirk:

Sounds like we have similar interests...

Roy's Tempest and/or Typhoon are on my build list as well. In fact, I have the Tempest plans, and like you will probably get to it next winter. (Unless Don's P61 "gets in the way". )

The Sierra gear are gorgeous... I was looking at them at the last WRAM show. Expensive... But I think worth the price.

The Sachs 5.2 should do nicely. I believe Roy flies his Typhoon with a Q75.