I understand Sewell is a good prospect and the whole "2 Elite tackles for ThE NeXt DeCaDe would be AWESOME!" part. But..
But if you're taking a legit LT and moving him to the right side, just trade down, get more picks and grab another OT later in the first to do that. Seems overkill to do that at 2.
There will be several other OL you can move to RT and do well if that's the move you wanna make.