Glad you shimmed the first side correctly:)
Once you have a true face on your spoilboard, you've got it made!
A lot of people just clamp it down, and of course when unclamped it will spring back, and muck up your second side as well.
Just going to post this Shopbot vid of flattening log slabs, as he goes into that;https://www.youtube.com/watch?time_continue=50&v=SbIzd1Ij_EA
Oh...WAS looking for his "Flattening a warped Board" tutorial as it was more relevant...but it was missing from New Shopbot training vid site:(
Yup, pretty soon you'll be going through cutoffs,short bins, and even firewood piles like me
You'll never pass a tree crew,woodpile, or furniture out for trash without at least glancing at it:)
Look at how well your Project turned out with "Rejects"
A lot of people pay through the nose for S4S dimensioned wood, when if time isn't the most crucial factor(hobbyists like me now), you can do a better, more accurate job on your machine.
Thanks for posting!!