Once every bracket was leveled out they were nailed in to the groves that were cut out of the tree and the brackets were screwed together. Than the table top needed to be made. Only cut-offs of former projects were used and some reclaimed wood. All connected together with random layers underneath to just avoid that "formal" look.
Because the tree was cut down for most part, it was easy to slide the table-top over the tree trunk.
After screwing the top on the brackets it got a treated with Nilzone, a stain that protects against all wood loving bugs. It's not clear where creativity will bring us, but something like barstools and some roof are most likely.