Trimmed inboard ends of spar channels per plans. Sanded and polished all edges on channels. Straight snips somewhat difficult to work with. Had to be very careful not to mar edges.
Bent the ends of the HS-810 and HS-814 to 6 degrees. I used hand seamer and the edge of the table.
Bent channel tongues to match. The manual says to do this with a hand-seamer, but my seamer is too wide, so I did it by hand on the edge of a table, which worked fine.
Clecoed spar components together; drilled holes outboard of bends.