Hi Ted,
Yes I did plane both sides before gluing. I think the slight twisting I got was because of the type of wood (mahogany). I've since read that this is not a suitable wood for steaming, being short grained and brittle so it is beginning to make sense to me now.
I don't fully understand all the aspects of this steaming business, perhaps if I knew before I started that I wasn't supposed to steam bend mahogany, I might not have done so, but, hey - it worked! :lol:
regards
Brian