After doing the bottom tabs, reassemble and make sure that everything is still aligned. Then do the top tabs following the same process. The instructions recommend substituting aircraft ply for the supplied tabs - I decided to use the stock tabs, but I reinforced the tabs with CA. Again, make sure that everything is dry before sliding those struts on (ask me how I know [X(] ). Next on to the cabanes. Dry fit. As per the instructions, I had to grind off some from the front and rear vertical cabanes. No big deal - grind, check, grind and you are good to go. Again, double check everything with the incidence meter and then grab the drill and let fly! Next, on to the hinges.