Offcut.....I have a small review of the finishes coming out soon, so if you can just hold on a few more days that would be great!
As for the joining of the top: I planed the timber all round and then layed out the boards for the best display of the quarter sawn rays and marked them up. From there I ran all the joining edges over the planer again just taking off a tiny, tiny amount to give a really smooth finish. I then tuned up my #7 with a tiny mouth and ran this over the edges to flatten out any ripples left by the planer. You could probably get away with out doing that last step really, as long as your planer blades are really sharp. I then marked up placements for some biscuits, about 3-4 to a 6' length. I used these just to help align the surfaces for each of the boards and not for any real extra strength. I don't even add glue to them either as they are a real bugger to clamp up on somthing this size when wet! Add some glue to the oak, making sure to cover all the mating surfaces and then clamp up and get three other people to give you a hand lifting the thing!!
Hope this helps, if you have any more questions feel free to ask!
SimonA