i have done this one before!!! heres the thing, stain no worries, glue you used for your backing worry. heres how you fix it. flash temper (so to speak) all your worried about in tempering is heating the belly side. use you gas grille, if you have one, heat on high for 3 mins and then clamp a little reflex in while it cools. You can even just hang a weight from the end while it cools. your backing should be ok because the high heat wont soak all the way through the wood. its worked for me a few times actually.