James,
I'm only going to use Alder for the base, still waiting on MsBubba to bless the slab. BTW, went to the wood store to buy the wood for the base, spent 40 or more minutes picking through the Alder bin for boards that were straight and correct width and didn't pay much attention to anything else. When I checked out the bill was $450 USD, whoa Nelly there ain't that much wood on my cart. Turns out someone had stacked some Hard Maple and White Oak in the Adler bin and only one of the boards I picked was Alder. That was the bad news, the good was all the last rejects I had re-stacked on top and all I had to do was exchange with out looking for good ones. The note was better as well only $120 USD out the door.
ken