Finally called LL yesterday to get some specific info on installation guidelines on installing the 3/4" (solid) x 2-1/4" santos mahogany flooring.
They indicated house needs to be 60-80* F with 30-50% rh. 2% variance in mc for subfloor/flooring.

Is there a chart or any other info available to determine what the mc should be for my geographical region? I am in Northern Indiana. Warm, humid summers and cold, dry winters.
Additionally, I am using hydronic radiant heat fastened to the bottom side of the subfloor. Heat has been on since Oct. 2010. Even on the coldest days this past winter the surface of the subfloor is around 80*, really not feeling very warm (but certainly not cold!) to the touch. Aside from paying attention so as not to puncture a tube with the flooring nails, is there anything else I should be aware of installing this floor over radiant heat?

Thanks

Have you checked with LL if your flooring is warrantied for radiant heat use?