Thanks for the link, now have it bookmarked. Looked online a bit and found this on a site that is in Austin, just an hour away. Not sure exactly how to interpret the movement, other than to think it is talking about movement from harvest-to-dried state. Doesn’t seem like useful info for already dried wood.

http://savagewoods.com/granadillo-wood/
Specific Gravity: 0.79
Hardness: 2450 Janka
Density: 63 pcf
Tangential Movement: 4%
Radial Movement: 2%
Volumetric Shrinkage: 6%
Durability: Excellent

I think 1/16" dado sounds about right for a floating bottom of granadillo, but was wondering if I might be able to laminate some maple/ash to that bottom plank and do a combination of rabbeted(maple/ash) and the dado’d grandillo? Now thinking about having a maple/ash skirt-base and sides with the granadillo on front, top, & back.

Personally, I don’t feel very creative and have always preferred following others’ plans/designs, and making slight alterations as needed. This is a brave new world for me, actually trying to “design” something… Been Googling finger-joint boxes and see just how varied things can get. Hmm…

Oh yeah, another thing I like about these boards is that the appear to be quarter-sawed, and should remain flat w/out cupping. 8-)

HorizontalMike